Stock Based Compensation (Awards of Restricted Stock) (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2025 $ / shares shares
Ratably Over 3 Years \| 2/15/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	1,090
Grant Date Fair Value Per Share \| $ / shares	$ 69.09
Vesting Terms	Ratably over 3 years from grant date
Ratably Over 3 Years \| 2/20/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	113,000
Grant Date Fair Value Per Share \| $ / shares	$ 68.83
Vesting Terms	Ratably over 3 years from grant date
Ratably Over 3 Years \| 4/15/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	1,360
Grant Date Fair Value Per Share \| $ / shares	$ 55.25
Vesting Terms	Ratably over 3 years from grant date
Ratably Over 3 Years \| 5/15/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	1,540
Grant Date Fair Value Per Share \| $ / shares	$ 65.05
Vesting Terms	Ratably over 3 years from grant date
Ratably Over 3 Years \| 6/15/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	3,380
Grant Date Fair Value Per Share \| $ / shares	$ 66.67
Vesting Terms	Ratably over 3 years from grant date
Ratably Over 3 Years \| 7/15/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	25,220
Grant Date Fair Value Per Share \| $ / shares	$ 65.63
Vesting Terms	Ratably over 3 years from grant date
Ratably Over 3 Years \| 9/15/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	1,430
Grant Date Fair Value Per Share \| $ / shares	$ 69.74
Vesting Terms	Ratably over 3 years from grant date
Ratably over 3 years from February 20, 2025 \| 3/15/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	2,600
Grant Date Fair Value Per Share \| $ / shares	$ 62.84
Vesting Terms	Ratably over 3 years from February 20, 2025
Immediately upon grant \| 5/20/2025 \| Two Thousand Eighteen Nonemployee Director Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	12,194
Grant Date Fair Value Per Share \| $ / shares	$ 64.03
Vesting Terms	Immediately upon grant date
Immediately upon grant \| 7/01/2025 \| Two Thousand Eighteen Nonemployee Director Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	2,814
Grant Date Fair Value Per Share \| $ / shares	$ 63.67
Vesting Terms	Immediately upon grant date
At the end of five years from grant \| 7/15/2025 \| 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted \| shares	7,620
Grant Date Fair Value Per Share \| $ / shares	$ 65.63
Vesting Terms	At the end of 5 years from grant date

INDEPENDENT BANK CORP 10-Q