Loans - Schedule of Amortized Cost Basis of Loan Modifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 29,148	$ 3,887	$ 31,551	$ 15,747
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.15%	0.03%	0.17%	0.12%
Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 1,142		$ 1,142	$ 8,043
Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	27,097	$ 1,251	29,255	3,964
Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	281	2,427	287	2,709
Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	129		366	442
Interest Rate Reduction and Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	499		499	255
Interest Rate Reduction, Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		3	2	128
Interest Rate Reduction and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		206		206
Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 27,126	$ 53	$ 27,126	$ 1,344
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.98%	0.00%	0.98%	0.07%
Commercial, financial, agricultural \| Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		$ 0	$ 1,097
Financing receivable, modified, weighted average interest rate decrease from modification				0.39%
Commercial, financial, agricultural \| Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 27,025	$ 0	$ 27,025	$ 69
Financing receivable, modified, weighted average term increase from modification	12 months		12 months	8 months
Commercial, financial, agricultural \| Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0	$ 53	$ 0	$ 53
Financing receivable, modified, weighted average term increase from modification		8 months		8 months
Commercial, financial, agricultural \| Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 101		$ 101	$ 0
Financing receivable, modified, weighted average term increase from modification	22 months		22 months
Commercial, financial, agricultural \| Interest Rate Reduction and Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		$ 0	0
Commercial, financial, agricultural \| Interest Rate Reduction, Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 0	0	$ 125
Financing receivable, modified, weighted average interest rate decrease from modification				1.81%
Financing receivable, modified, weighted average term increase from modification				59 months
Commercial, financial, agricultural \| Interest Rate Reduction and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		0		$ 0
Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.00%
Lease financing \| Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0
Lease financing \| Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0
Lease financing \| Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0
Lease financing \| Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0
Lease financing \| Interest Rate Reduction and Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0
Real estate – construction: \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			$ 235
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage			0.06%
Real estate – construction: \| Interest Rate Reduction \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			$ 0
Real estate – construction: \| Term Extension \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			0
Real estate – construction: \| Payment Delay \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			0
Real estate – construction: \| Term Extension and Payment Delay \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			$ 235
Real estate – construction: \| Term Extension and Payment Delay \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modified, weighted average term increase from modification			35 months
Real estate – construction: \| Interest Rate Reduction and Term Extension \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			$ 0
Real estate – construction: \| Interest Rate Reduction, Term Extension and Payment Delay \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			0
Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 337	$ 2,539	$ 337	$ 3,200
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.01%	0.00%	0.01%	0.09%
Real estate – 1-4 family mortgage: \| Primary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 174	$ 1,849	$ 174	$ 2,510
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.01%	0.08%	0.01%	0.10%
Real estate – 1-4 family mortgage: \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 163	$ 106	$ 163	$ 106
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.02%	0.02%	0.02%	0.02%
Real estate – 1-4 family mortgage: \| Rental/investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 584		$ 584
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage		0.15%		0.15%
Real estate – 1-4 family mortgage: \| Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		$ 0	$ 0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction \| Primary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction \| Rental/investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction				0
Real estate – 1-4 family mortgage: \| Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	39	$ 165	39	198
Real estate – 1-4 family mortgage: \| Term Extension \| Primary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0	$ 23	0	$ 56
Financing receivable, modified, weighted average term increase from modification		90 months		51 months
Real estate – 1-4 family mortgage: \| Term Extension \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 39	$ 106	$ 39	$ 106
Financing receivable, modified, weighted average term increase from modification	56 months	16 months	56 months	16 months
Real estate – 1-4 family mortgage: \| Term Extension \| Rental/investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 36		$ 36
Financing receivable, modified, weighted average term increase from modification		6 months		6 months
Real estate – 1-4 family mortgage: \| Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 281	$ 2,168	$ 281	$ 2,354
Real estate – 1-4 family mortgage: \| Payment Delay \| Primary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 157	$ 1,620	$ 157	$ 1,806
Financing receivable, modified, weighted average term increase from modification	16 months	19 months	16 months	22 months
Real estate – 1-4 family mortgage: \| Payment Delay \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 124	$ 0	$ 124	$ 0
Financing receivable, modified, weighted average term increase from modification	51 months		50 months
Real estate – 1-4 family mortgage: \| Payment Delay \| Rental/investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 548		$ 548
Financing receivable, modified, weighted average term increase from modification		131 months		131 months
Real estate – 1-4 family mortgage: \| Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 17		$ 17	$ 442
Real estate – 1-4 family mortgage: \| Term Extension and Payment Delay \| Primary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 17		$ 17	$ 442
Financing receivable, modified, weighted average term increase from modification	19 months		19 months	42 months
Real estate – 1-4 family mortgage: \| Term Extension and Payment Delay \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		$ 0	$ 0
Real estate – 1-4 family mortgage: \| Term Extension and Payment Delay \| Rental/investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction				0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction and Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction and Term Extension \| Primary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction and Term Extension \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction and Term Extension \| Rental/investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction				0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction, Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 0	0	0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction, Term Extension and Payment Delay \| Primary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		0	0	0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction, Term Extension and Payment Delay \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		0	0	0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction, Term Extension and Payment Delay \| Rental/investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		0		0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		206		206
Real estate – 1-4 family mortgage: \| Interest Rate Reduction and Payment Delay \| Primary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 206		206
Financing receivable, modified, weighted average interest rate decrease from modification		0.25%
Financing receivable, modified, weighted average term increase from modification		51 months
Real estate – 1-4 family mortgage: \| Interest Rate Reduction and Payment Delay \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 0		0
Real estate – 1-4 family mortgage: \| Interest Rate Reduction and Payment Delay \| Rental/investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		0		0
Real Estate - Commercial Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 1,674		$ 3,751	$ 11,187
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.02%		0.04%	0.19%
Real Estate - Commercial Mortgage \| Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 1,284	$ 1,292	$ 1,284	$ 8,673
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.04%	0.07%	0.04%	0.47%
Real Estate - Commercial Mortgage \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 357		$ 2,434	$ 2,514
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.01%		0.04%	0.06%
Real Estate - Commercial Mortgage \| Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 33		$ 33
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.01%		0.01%
Real Estate - Commercial Mortgage \| Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 1,142		$ 1,142	$ 6,946
Real Estate - Commercial Mortgage \| Interest Rate Reduction \| Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 1,142		$ 1,142	$ 6,946
Financing receivable, modified, weighted average interest rate decrease from modification	4.85%		4.85%	0.47%
Financing receivable, modified, weighted average term increase from modification	80 months
Real Estate - Commercial Mortgage \| Interest Rate Reduction \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		$ 0	$ 0
Financing receivable, modified, weighted average interest rate decrease from modification	0.45%
Financing receivable, modified, weighted average term increase from modification	81 months
Real Estate - Commercial Mortgage \| Interest Rate Reduction \| Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		0
Real Estate - Commercial Mortgage \| Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	33		2,110	3,697
Real Estate - Commercial Mortgage \| Term Extension \| Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0	$ 1,086	0	$ 1,266
Financing receivable, modified, weighted average term increase from modification		8 months		8 months
Real Estate - Commercial Mortgage \| Term Extension \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		$ 2,077	$ 2,431
Financing receivable, modified, weighted average term increase from modification			12 months	8 months
Real Estate - Commercial Mortgage \| Term Extension \| Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 33		$ 33
Financing receivable, modified, weighted average term increase from modification	60 months		60 months
Real Estate - Commercial Mortgage \| Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		$ 0	$ 289
Real Estate - Commercial Mortgage \| Payment Delay \| Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0	$ 206	0	$ 206
Financing receivable, modified, weighted average term increase from modification		40 months		40 months
Real Estate - Commercial Mortgage \| Payment Delay \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	$ 83
Financing receivable, modified, weighted average term increase from modification				9 months
Real Estate - Commercial Mortgage \| Payment Delay \| Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0
Real Estate - Commercial Mortgage \| Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	$ 0
Real Estate - Commercial Mortgage \| Term Extension and Payment Delay \| Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	0
Real Estate - Commercial Mortgage \| Term Extension and Payment Delay \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0	0
Real Estate - Commercial Mortgage \| Term Extension and Payment Delay \| Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		0
Real Estate - Commercial Mortgage \| Interest Rate Reduction and Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	499		499	255
Real Estate - Commercial Mortgage \| Interest Rate Reduction and Term Extension \| Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 142		$ 142	$ 255
Financing receivable, modified, weighted average interest rate decrease from modification	0.45%		0.45%	2.75%
Financing receivable, modified, weighted average term increase from modification			80 months	21 months
Real Estate - Commercial Mortgage \| Interest Rate Reduction and Term Extension \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 357		$ 357	$ 0
Financing receivable, modified, weighted average interest rate decrease from modification			0.45%
Financing receivable, modified, weighted average term increase from modification			81 months
Real Estate - Commercial Mortgage \| Interest Rate Reduction and Term Extension \| Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0		$ 0
Real Estate - Commercial Mortgage \| Interest Rate Reduction, Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			0	0
Real Estate - Commercial Mortgage \| Interest Rate Reduction, Term Extension and Payment Delay \| Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 0	0	0
Real Estate - Commercial Mortgage \| Interest Rate Reduction, Term Extension and Payment Delay \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			0	0
Real Estate - Commercial Mortgage \| Interest Rate Reduction, Term Extension and Payment Delay \| Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction			0
Real Estate - Commercial Mortgage \| Interest Rate Reduction and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction				0
Real Estate - Commercial Mortgage \| Interest Rate Reduction and Payment Delay \| Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		0		$ 0
Financing receivable, modified, weighted average interest rate decrease from modification				0.25%
Financing receivable, modified, weighted average term increase from modification				51 months
Real Estate - Commercial Mortgage \| Interest Rate Reduction and Payment Delay \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction				$ 0
Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 11	$ 3	$ 102	$ 16
Financing receivable, excluding accrued interest, modified in period, to total financing receivables, percentage	0.01%	0.00%	0.09%	0.02%
Installment loans to individuals \| Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		$ 0	$ 0
Installment loans to individuals \| Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0	$ 0	$ 81	0
Financing receivable, modified, weighted average term increase from modification			124 months
Installment loans to individuals \| Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	0	0	$ 6	$ 13
Financing receivable, modified, weighted average term increase from modification			23 months	17 months
Installment loans to individuals \| Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 11		$ 13	$ 0
Financing receivable, modified, weighted average term increase from modification	43 months		45 months
Installment loans to individuals \| Interest Rate Reduction and Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction	$ 0		$ 0	0
Installment loans to individuals \| Interest Rate Reduction, Term Extension and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 3	$ 2	$ 3
Financing receivable, modified, weighted average interest rate decrease from modification		4.60%	4.25%	4.60%
Financing receivable, modified, weighted average term increase from modification		54 months	49 months	54 months
Installment loans to individuals \| Interest Rate Reduction and Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modification, Interest rate reduction		$ 0		$ 0

RENASANT CORP 10-Q