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Stockholders' Equity - Required Capital Amounts and Company's Respective Ratios (Detail)
$ in Thousands
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Parent Company [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital Amount $ 1,643,476 $ 1,467,062
Total Capital To Risk Weighted Assets Actual Ratio 0.1849 0.169
Capital Required For Capital Adequacy Amount $ 711,023 $ 694,520
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio 0.08 0.08
Capital With Capital Conservation Buffer Amount $ 933,218 $ 911,558
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio 0.105 0.105
Common Equity Tier 1 Risk Based Capital Amount $ 1,458,626 $ 1,284,966
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio 0.1641 0.148
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount $ 399,951 $ 390,668
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio 0.045 0.045
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount $ 622,145 $ 607,705
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio 0.07 0.07
Tier 1 Risk Based Capital Amount $ 1,484,626 $ 1,310,966
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio 0.167 0.151
Tier 1 Risk Based Capital Required For Capital Adequacy Amount $ 533,267 $ 520,890
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio 0.06 0.06
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount $ 755,462 $ 737,928
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio 0.085 0.085
Tier 1 Capital Amount $ 1,484,626 $ 1,310,966
Tier 1 Capital To Quarterly Average Assets Ratio 0.1117 0.1076
Tier 1 Capital Required For Capital Adequacy Amount $ 531,705 $ 487,279
Tier 1 Capital Required For Capital Adequacy To Quarterly Average Assets Ratio 0.04 0.04
BancFirst [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital Amount $ 1,240,164 $ 1,166,750
Total Capital To Risk Weighted Assets Actual Ratio 0.1681 0.1568
Capital Required For Capital Adequacy Amount $ 590,178 $ 595,191
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio 0.08 0.08
Capital With Capital Conservation Buffer Amount $ 774,608 $ 781,189
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio 0.105 0.105
Capital Required To Be Well Capitalized Amount $ 737,722 $ 743,989
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.10 0.10
Common Equity Tier 1 Risk Based Capital Amount $ 1,137,645 $ 1,061,943
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio 0.1542 0.1427
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount $ 331,975 $ 334,795
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio 0.045 0.045
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount $ 516,405 $ 520,792
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio 0.07 0.07
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount $ 479,519 $ 483,593
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.065 0.065
Tier 1 Risk Based Capital Amount $ 1,157,645 $ 1,081,943
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio 0.1569 0.1454
Tier 1 Risk Based Capital Required For Capital Adequacy Amount $ 442,633 $ 446,393
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio 0.06 0.06
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount $ 627,064 $ 632,391
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio 0.085 0.085
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount $ 590,178 $ 595,191
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.08 0.08
Tier 1 Capital Amount $ 1,157,645 $ 1,081,943
Tier 1 Capital To Quarterly Average Assets Ratio 0.1029 0.1043
Tier 1 Capital Required For Capital Adequacy Amount $ 449,998 $ 414,882
Tier 1 Capital Required For Capital Adequacy To Quarterly Average Assets Ratio 0.04 0.04
Tier 1 Capital Required To Be Well Capitalized Amount $ 562,497 $ 518,603
Tier 1 Capital Required To Be Well Capitalized To Quarterly Average Assets Ratio 0.05 0.05
Pegasus [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital Amount $ 156,023 $ 139,472
Total Capital To Risk Weighted Assets Actual Ratio 0.1612 0.1698
Capital Required For Capital Adequacy Amount $ 77,410 $ 65,706
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio 0.08 0.08
Capital With Capital Conservation Buffer Amount $ 101,601 $ 86,239
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio 0.105 0.105
Capital Required To Be Well Capitalized Amount $ 96,763 $ 82,132
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.10 0.10
Common Equity Tier 1 Risk Based Capital Amount $ 146,237 $ 130,792
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio 0.1511 0.1592
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount $ 43,543 $ 36,959
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio 0.045 0.045
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount $ 67,734 $ 57,492
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio 0.07 0.07
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount $ 62,896 $ 53,386
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.065 0.065
Tier 1 Risk Based Capital Amount $ 146,237 $ 130,792
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio 0.1511 0.1592
Tier 1 Risk Based Capital Required For Capital Adequacy Amount $ 58,058 $ 49,279
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio 0.06 0.06
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount $ 82,248 $ 69,812
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio 0.085 0.085
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount $ 77,410 $ 65,706
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.08 0.08
Tier 1 Capital Amount $ 146,237 $ 130,792
Tier 1 Capital To Quarterly Average Assets Ratio 0.1075 0.1056
Tier 1 Capital Required For Capital Adequacy Amount $ 54,435 $ 49,529
Tier 1 Capital Required For Capital Adequacy To Quarterly Average Assets Ratio 0.04 0.04
Tier 1 Capital Required To Be Well Capitalized Amount $ 68,044 $ 61,911
Tier 1 Capital Required To Be Well Capitalized To Quarterly Average Assets Ratio 0.05 0.05
Worthington [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital Amount $ 55,521 $ 51,608
Total Capital To Risk Weighted Assets Actual Ratio 0.1212 0.123
Capital Required For Capital Adequacy Amount $ 36,645 $ 33,571
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio 0.08 0.08
Capital With Capital Conservation Buffer Amount $ 48,096 $ 44,061
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio 0.105 0.105
Capital Required To Be Well Capitalized Amount $ 45,806 $ 41,963
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.10 0.10
Common Equity Tier 1 Risk Based Capital Amount $ 51,313 $ 47,690
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio 0.112 0.1136
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount $ 20,613 $ 18,883
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio 0.045 0.045
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount $ 32,064 $ 29,374
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio 0.07 0.07
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount $ 29,774 $ 27,276
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.065 0.065
Tier 1 Risk Based Capital Amount $ 51,313 $ 47,690
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio 0.112 0.1136
Tier 1 Risk Based Capital Required For Capital Adequacy Amount $ 27,484 $ 25,178
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio 0.06 0.06
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount $ 38,935 $ 35,669
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio 0.085 0.085
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount $ 36,645 $ 33,571
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio 0.08 0.08
Tier 1 Capital Amount $ 51,313 $ 47,690
Tier 1 Capital To Quarterly Average Assets Ratio 0.0841 0.0862
Tier 1 Capital Required For Capital Adequacy Amount $ 24,399 $ 22,140
Tier 1 Capital Required For Capital Adequacy To Quarterly Average Assets Ratio 0.04 0.04
Tier 1 Capital Required To Be Well Capitalized Amount $ 30,498 $ 27,675
Tier 1 Capital Required To Be Well Capitalized To Quarterly Average Assets Ratio 0.05 0.05