v3.26.1
Regulatory Capital - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Banking Regulation, Risk-Based Information [Abstract]    
Capital ($) $ 1,106,600 $ 989,634
Capital to RWA (%) 0.1541 0.1567
Capital Required for Capital Adequacy ($) $ 754,208 $ 663,053
Capital Required for Capital Adequacy to RWA (%) 0.105 0.105
Tier One Risk Based Capital ($) $ 996,467 $ 855,405
Tier One Risk Based Capital to RWA (%) 0.1387 0.1355
Tier One Risk Based Capital Required for Capital Adequacy ($) $ 610,550 $ 536,757
Tier One Risk Based Capital Required for Capital Adequacy to RWA (%) 0.085 0.085
Common Equity Tier One Risk Based Capital ($) $ 962,390 $ 830,951
Common Equity Tier One Risk Based Capital To RWA (%) 0.134 0.1316
Common Equity Tier One Risk Based Capital Required For Capital Adequacy ($) $ 502,806 $ 442,035
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to RWA (%) 0.07 0.07
Tier One Leverage Capital to Average Assets $ 996,467 $ 855,405
Tier One Leverage Capital to Average Assets (%) 0.1092 0.1107
Tier One Leverage Capital Required for Capital Adequacy ($) $ 365,096 $ 308,994
Tier One Leverage Capital Required for Capital Adequacy to Average Assets (%) 0.04 0.04
First Mid Bank    
Banking Regulation, Risk-Based Information [Abstract]    
Capital ($) $ 1,049,100 $ 910,047
Capital to RWA (%) 0.1466 0.1447
Capital Required for Capital Adequacy ($) $ 751,249 $ 660,282
Capital Required for Capital Adequacy to RWA (%) 0.105 0.105
Capital Required to be Well Capitalized ($) $ 715,476 $ 628,840
Capital Required to be Well Capitalized to RWA (%) 0.10 0.10
Tier One Risk Based Capital ($) $ 971,672 $ 835,826
Tier One Risk Based Capital to RWA (%) 0.1358 0.1329
Tier One Risk Based Capital Required for Capital Adequacy with Capital Buffer ($) $ 608,154 $ 534,514
Tier One Risk Based Capital Required for Capital Adequacy with Capital Buffer to RWA (%) 0.085 0.085
Tier One Risk Based Capital Required to be Well Capitalized ($) $ 572,380 $ 503,072
Tier One Risk Based Capital Required to be Well Capitalized to RWA (%) 0.08 0.08
Common Equity Tier One Risk Based Capital ($) $ 971,672 $ 835,826
Common Equity Tier One Risk Based Capital To RWA (%) 0.1358 0.1329
Common Equity Tier One Risk Based Capital Required For Capital Adequacy ($) $ 500,833 $ 440,188
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to RWA (%) 0.07 0.07
Common Equity Tier One Risk Based Capital Required to Be Well Capitalized ($) $ 465,059 $ 408,746
Common Equity Tier One Risk Based Capital Required To Be Well Capitalized to RiWA (%) 0.065 0.065
Tier One Leverage Capital to Average Assets $ 971,672 $ 835,826
Tier One Leverage Capital to Average Assets (%) 0.107 0.1088
Tier One Leverage Capital Required for Capital Adequacy ($) $ 363,244 $ 307,361
Tier One Leverage Capital Required for Capital Adequacy to Average Assets (%) 0.04 0.04
Tier One Leverage Capital Required to be Well Capitalized ($) $ 454,055 $ 384,201
Tier One Leverage Capital Required to be Well Capitalized to Average Assets (%) 0.05 0.05