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Stockholders' Equity - Required Capital Amounts and Company's Respective Ratios (Detail) $ in Thousands | Sep. 30, 2019 USD ($)
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Parent Company [Member] |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
Total Capital Amount | $ 887,070
Total Capital To Risk Weighted Assets Actual Ratio | 14.34%
Capital Required For Capital Adequacy Amount | $ 494,966
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio | 8.00%
Capital With Capital Conservation Buffer Amount | $ 649,643
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio | 10.50%
Common Equity Tier 1 Risk Based Capital Amount | $ 805,142
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio | 13.01%
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount | $ 278,418
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio | 4.50%
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount | $ 433,095
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio | 7.00%
Tier 1 Risk Based Capital Amount | $ 831,142
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio | 13.43%
Tier 1 Risk Based Capital Required For Capital Adequacy Amount | $ 371,225
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio | 6.00%
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount | $ 525,901
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio | 8.50%
Tier 1 Capital Amount | $ 831,142
Tier 1 Capital To Average Assets Ratio | 10.59%
Tier 1 Capital Required For Capital Adequacy Amount | $ 314,007
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio | 4.00%
BancFirst [Member] |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
Total Capital Amount | $ 812,703
Total Capital To Risk Weighted Assets Actual Ratio | 14.12%
Capital Required For Capital Adequacy Amount | $ 460,315
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio | 8.00%
Capital With Capital Conservation Buffer Amount | $ 604,164
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio | 10.50%
Capital Required To Be Well Capitalized Amount | $ 575,394
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio | 10.00%
Common Equity Tier 1 Risk Based Capital Amount | $ 736,839
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio | 12.81%
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount | $ 258,927
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio | 4.50%
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount | $ 402,776
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio | 7.00%
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount | $ 374,006
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio | 6.50%
Tier 1 Risk Based Capital Amount | $ 756,839
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio | 13.15%
Tier 1 Risk Based Capital Required For Capital Adequacy Amount | $ 345,236
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio | 6.00%
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount | $ 489,085
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio | 8.50%
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount | $ 460,315
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio | 8.00%
Tier 1 Capital Amount | $ 756,839
Tier 1 Capital To Average Assets Ratio | 10.06%
Tier 1 Capital Required For Capital Adequacy Amount | $ 300,900
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio | 4.00%
Tier 1 Capital Required To Be Well Capitalized Amount | $ 376,124
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio | 5.00%
Pegasus Bank [Member] |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
Total Capital Amount | $ 55,783
Total Capital To Risk Weighted Assets Actual Ratio | 13.38%
Capital Required For Capital Adequacy Amount | $ 33,359
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio | 8.00%
Capital With Capital Conservation Buffer Amount | $ 43,784
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio | 10.50%
Capital Required To Be Well Capitalized Amount | $ 41,699
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio | 10.00%
Common Equity Tier 1 Risk Based Capital Amount | $ 52,286
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio | 12.54%
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount | $ 18,765
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio | 4.50%
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount | $ 29,190
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio | 7.00%
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount | $ 27,105
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio | 6.50%
Tier 1 Risk Based Capital Amount | $ 52,286
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio | 12.54%
Tier 1 Risk Based Capital Required For Capital Adequacy Amount | $ 25,020
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio | 6.00%
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount | $ 35,444
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio | 8.50%
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount | $ 33,359
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio | 8.00%
Tier 1 Capital Amount | $ 52,286
Tier 1 Capital To Average Assets Ratio | 7.71%
Tier 1 Capital Required For Capital Adequacy Amount | $ 27,139
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio | 4.00%
Tier 1 Capital Required To Be Well Capitalized Amount | $ 33,924
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio | 5.00%

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