Regulatory Capital Requirements (Details) $ in Thousands	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Red River Bancshares, Inc.
Total Risk-Based Capital
Actual amount	$ 419,847	$ 400,813
Actual ratio (as a percent)	0.1818	0.1813
Regulatory requirements, minimum, amount	$ 242,432	$ 232,161
Regulatory requirements, minimum, ratio (as a percent)	0.1050	0.1050
Tier I Risk-Based Capital
Actual amount	$ 396,404	$ 378,440
Actual ratio (as a percent)	0.1717	0.1712
Regulatory requirements, minimum, amount	$ 196,255	$ 187,940
Regulatory requirements, minimum, ratio (as a percent)	0.0850	0.0850
Common Equity Tier I Capital
Actual amount	$ 396,404	$ 378,440
Actual ratio (as a percent)	0.1717	0.1712
Regulatory requirements, minimum, amount	$ 161,622	$ 154,774
Regulatory requirements, minimum, ratio (as a percent)	0.0700	0.0700
Tier I Leverage Capital
Actual amount	$ 396,404	$ 378,440
Actual ratio (as a percent)	0.1217	0.1186
Regulatory requirements, minimum, amount	$ 130,245	$ 127,615
Regulatory requirements, minimum, ratio (as a percent)	0.0400	0.0400
Red River Bank
Total Risk-Based Capital
Actual amount	$ 411,105	$ 393,743
Actual ratio (as a percent)	0.1781	0.1781
Regulatory requirements, minimum, amount	$ 242,352	$ 232,092
Regulatory requirements, minimum, ratio (as a percent)	0.1050	0.1050
Regulatory requirements, minimum plus CCB, amount	$ 230,811	$ 221,040
Regulatory requirements, minimum plus CCB, ratio (as a percent)	0.1000	0.1000
Tier I Risk-Based Capital
Actual amount	$ 387,662	$ 371,370
Actual ratio (as a percent)	0.1680	0.1680
Regulatory requirements, minimum, amount	$ 196,190	$ 187,884
Regulatory requirements, minimum, ratio (as a percent)	0.0850	0.0850
Regulatory requirements, minimum, amount	$ 184,649	$ 176,832
Regulatory requirements, minimum, ratio (as a percent)	0.0800	0.0800
Common Equity Tier I Capital
Actual amount	$ 387,662	$ 371,370
Actual ratio (as a percent)	0.1680	0.1680
Regulatory requirements, minimum, amount	$ 161,568	$ 154,728
Regulatory requirements, minimum, ratio (as a percent)	0.0700	0.0700
Regulatory requirements, minimum plus CCB, amount	$ 150,027	$ 143,676
Regulatory requirements, minimum plus CCB, ratio (as a percent)	0.0650	0.0650
Tier I Leverage Capital
Actual amount	$ 387,662	$ 371,370
Actual ratio (as a percent)	0.1191	0.1164
Regulatory requirements, minimum, amount	$ 130,207	$ 127,582
Regulatory requirements, minimum, ratio (as a percent)	0.0400	0.0400
Regulatory requirements, minimum plus CCB, amount	$ 162,758	$ 159,477
Regulatory requirements, minimum plus CCB, ratio (as a percent)	0.0500	0.0500

RED RIVER BANCSHARES INC 10-Q