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Loans Held for Investment and Allowance for Credit Losses on Loans (Tables) | 12 Months Ended
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Dec. 31, 2020
Receivables [Abstract] |
Summary of Loans Held for Investment by Portfolio Segment | Loans held for investment are summarized by portfolio segment as follows:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | Amount |  |  | Amount |
|  | (Dollars in thousands) |
BancFirst |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |
Commercial real estate owner occupied |  | $ | 641,987 |  |  | $ | 621,188 |
Commercial real estate non-owner occupied |  |  | 971,158 |  |  |  | 851,200 |
Construction and development < 60 months |  |  | 229,615 |  |  |  | 287,138 |
Construction residential real estate < 60 months |  |  | 206,195 |  |  |  | 189,480 |
Residential real estate first lien |  |  | 853,316 |  |  |  | 834,849 |
Residential real estate all other |  |  | 168,081 |  |  |  | 187,647 |
Farmland |  |  | 252,958 |  |  |  | 246,988 |
Commercial and agricultural non-real estate |  |  | 1,159,810 |  |  |  | 1,315,005 |
Consumer non-real estate |  |  | 355,405 |  |  |  | 359,529 |
Oil and gas |  |  | 179,355 |  |  |  | 184,399 |
Other loans (2) |  |  | 822,078 |  |  |  | 154,015 |
Pegasus Bank |  |  | 554,548 |  |  |  | 430,705 |
Total loans (1) |  | $ | 6,394,506 |  |  | $ | 5,662,143 |
(1) Excludes accrued interest receivable of $26.0 million at December 31, 2020 and $24.5 million at December 31, 2019, that is recorded in accrued interest receivable and other assets. |
(2) Includes PPP loans of $652.7 million, net of unamortized processing fees of $14.5 million at December 31, 2020. |
Summary of Troubled Debt Restructurings and Other Real Estate Owned and Repossessed Assets | The following is a summary of troubled debt restructurings and other real estate owned and repossessed assets:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | (Dollars in thousands) |
Troubled debt restructurings |  | $ | 7,784 |  |  | $ | 18,010 |
Other real estate owned and repossessed assets |  | $ | 32,480 |  |  | $ | 6,073 |
Summary of Amounts Included in Nonaccrual Loans Segregated by Portfolio Segment | The following table is a summary of amounts included in nonaccrual loans, segregated by portfolio segment.
|  | December 31, 2020 |
|  | (Dollars in thousands) |
BancFirst |  |  |  |
Real estate: |  |  |  |
Commercial real estate owner occupied |  | $ | 1,404 |
Commercial real estate non-owner occupied |  |  | 4,719 |
Construction and development < 60 months |  |  | 95 |
Construction residential real estate < 60 months |  |  | — |
Residential real estate first lien |  |  | 3,615 |
Residential real estate all other |  |  | 1,362 |
Farmland |  |  | 7,901 |
Commercial and agricultural non-real estate |  |  | 12,782 |
Consumer non-real estate |  |  | 268 |
Oil and gas |  |  | — |
Other loans |  |  | 5,399 |
Pegasus Bank |  |  | — |
Total |  | $ | 37,545 |
|  | December 31, 2019 |
|  | (Dollars in thousands) |
BancFirst |  |  |  |
Real estate: |  |  |  |
Non-residential real estate owner occupied |  | $ | 2,275 |
Non-residential real estate other |  |  | 1,815 |
Residential real estate permanent mortgage |  |  | 1,206 |
Residential real estate other |  |  | 3,060 |
Non-consumer non-real estate |  |  | 2,915 |
Consumer other |  |  | 264 |
Other loans |  |  | 1,083 |
Acquired loans |  |  | 4,496 |
Pegasus Bank |  |  | 851 |
Total |  | $ | 17,965 |
Age Analysis of Loans Held for Investments | Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following table presents an age analysis of our loans held for investment:
|  | Age Analysis of Past Due Loans |
|  | 30-59 Days Past Due |  |  | 60-89 Days Past Due |  |  | 90 Days and Greater |  |  | Total Past Due Loans |  |  | Current Loans |  |  | Total Loans |  |  | Accruing Loans 90 Days or More Past Due |
|  | (Dollars in thousands) |
As of December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate owner occupied |  | $ | 1,096 |  |  | $ | 108 |  |  | $ | 1,164 |  |  | $ | 2,368 |  |  | $ | 639,619 |  |  | $ | 641,987 |  |  | $ | — |
Commercial real estate non-owner occupied |  |  | 323 |  |  |  | — |  |  |  | 34 |  |  |  | 357 |  |  |  | 970,801 |  |  |  | 971,158 |  |  |  | 35 |
Construction and development < 60 months |  |  | 511 |  |  |  | 86 |  |  |  | — |  |  |  | 597 |  |  |  | 229,018 |  |  |  | 229,615 |  |  |  | — |
Construction residential real estate < 60 months |  |  | 1,106 |  |  |  | — |  |  |  | 282 |  |  |  | 1,388 |  |  |  | 204,807 |  |  |  | 206,195 |  |  |  | 282 |
Residential real estate first lien |  |  | 5,428 |  |  |  | 1,463 |  |  |  | 2,978 |  |  |  | 9,869 |  |  |  | 843,447 |  |  |  | 853,316 |  |  |  | 945 |
Residential real estate all other |  |  | 520 |  |  |  | 55 |  |  |  | 1,606 |  |  |  | 2,181 |  |  |  | 165,900 |  |  |  | 168,081 |  |  |  | 384 |
Farmland |  |  | 1,297 |  |  |  | 344 |  |  |  | 6,223 |  |  |  | 7,864 |  |  |  | 245,094 |  |  |  | 252,958 |  |  |  | 135 |
Commercial and agricultural non-real estate |  |  | 2,788 |  |  |  | 1,794 |  |  |  | 4,345 |  |  |  | 8,927 |  |  |  | 1,150,883 |  |  |  | 1,159,810 |  |  |  | 465 |
Consumer non-real estate |  |  | 2,154 |  |  |  | 501 |  |  |  | 534 |  |  |  | 3,189 |  |  |  | 352,216 |  |  |  | 355,405 |  |  |  | 386 |
Oil and gas |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 179,355 |  |  |  | 179,355 |  |  |  | — |
Other loans |  |  | 951 |  |  |  | 1,223 |  |  |  | 6,618 |  |  |  | 8,792 |  |  |  | 813,286 |  |  |  | 822,078 |  |  |  | 2,170 |
Pegasus Bank |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 554,548 |  |  |  | 554,548 |  |  |  | — |
Total |  | $ | 16,174 |  |  | $ | 5,574 |  |  | $ | 23,784 |  |  | $ | 45,532 |  |  | $ | 6,348,974 |  |  | $ | 6,394,506 |  |  | $ | 4,802 |
As of December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-residential real estate owner occupied |  | $ | 1,600 |  |  | $ | 967 |  |  | $ | 5,159 |  |  | $ | 7,726 |  |  | $ | 699,690 |  |  | $ | 707,416 |  |  | $ | 3,799 |
Non-residential real estate other |  |  | 971 |  |  |  | — |  |  |  | 1,228 |  |  |  | 2,199 |  |  |  | 1,134,976 |  |  |  | 1,137,175 |  |  |  | — |
Residential real estate permanent mortgage |  |  | 4,705 |  |  |  | 973 |  |  |  | 2,215 |  |  |  | 7,893 |  |  |  | 332,679 |  |  |  | 340,572 |  |  |  | 1,660 |
Residential real estate other |  |  | 4,496 |  |  |  | 1,028 |  |  |  | 2,541 |  |  |  | 8,065 |  |  |  | 912,767 |  |  |  | 920,832 |  |  |  | 549 |
Non-consumer non-real estate |  |  | 2,290 |  |  |  | 1,446 |  |  |  | 1,763 |  |  |  | 5,499 |  |  |  | 1,448,894 |  |  |  | 1,454,393 |  |  |  | 354 |
Consumer other |  |  | 2,829 |  |  |  | 858 |  |  |  | 592 |  |  |  | 4,279 |  |  |  | 358,075 |  |  |  | 362,354 |  |  |  | 491 |
Other loans |  |  | 1,670 |  |  |  | 8 |  |  |  | 4,613 |  |  |  | 6,291 |  |  |  | 147,724 |  |  |  | 154,015 |  |  |  | 4,426 |
Acquired loans |  |  | 2,167 |  |  |  | 1,376 |  |  |  | 3,447 |  |  |  | 6,990 |  |  |  | 147,691 |  |  |  | 154,681 |  |  |  | 555 |
Pegasus Bank |  |  | — |  |  |  | — |  |  |  | 851 |  |  |  | 851 |  |  |  | 429,854 |  |  |  | 430,705 |  |  |  | — |
Total |  | $ | 20,728 |  |  | $ | 6,656 |  |  | $ | 22,409 |  |  | $ | 49,793 |  |  | $ | 5,612,350 |  |  | $ | 5,662,143 |  |  | $ | 11,834 |
Gross Loans Held for Investment by Year of Origination and Internally Assigned Credit Grades | The following table summarizes our gross loans held for investment by year of origination and internally assigned credit grades:
|  | Term Loans Amortized Cost Basis by Origination Year |  |  |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | 2018 |  |  | 2017 |  |  | 2016 |  |  | Prior |  |  | Revolving Loans Amortized Cost Basis |  |  | Total |
|  | (Dollars in thousands) |
As of December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate owner occupied |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  | $ | 142,574 |  |  | $ | 91,493 |  |  | $ | 73,845 |  |  | $ | 42,289 |  |  | $ | 37,097 |  |  | $ | 88,724 |  |  | $ | 17,153 |  |  | $ | 493,175 |
Grade 2 |  |  | 42,375 |  |  |  | 31,314 |  |  |  | 11,516 |  |  |  | 9,644 |  |  |  | 13,316 |  |  |  | 25,574 |  |  |  | 4,393 |  |  |  | 138,132 |
Grade 3 |  |  | 4,226 |  |  |  | 32 |  |  |  | 333 |  |  |  | 704 |  |  |  | 1,259 |  |  |  | 2,671 |  |  |  | — |  |  |  | 9,225 |
Grade 4 |  |  | 37 |  |  |  | 66 |  |  |  | 742 |  |  |  | — |  |  |  | 251 |  |  |  | 52 |  |  |  | 307 |  |  |  | 1,455 |
Total commercial real estate owner occupied loans |  |  | 189,212 |  |  |  | 122,905 |  |  |  | 86,436 |  |  |  | 52,637 |  |  |  | 51,923 |  |  |  | 117,021 |  |  |  | 21,853 |  |  |  | 641,987 |
Commercial real estate non-owner occupied |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 256,128 |  |  |  | 157,526 |  |  |  | 83,869 |  |  |  | 69,864 |  |  |  | 82,088 |  |  |  | 81,499 |  |  |  | 13,206 |  |  |  | 744,180 |
Grade 2 |  |  | 60,607 |  |  |  | 48,751 |  |  |  | 26,441 |  |  |  | 18,070 |  |  |  | 8,755 |  |  |  | 41,491 |  |  |  | 4,454 |  |  |  | 208,569 |
Grade 3 |  |  | 7,718 |  |  |  | 3,137 |  |  |  | 472 |  |  |  | 1,937 |  |  |  | 40 |  |  |  | 148 |  |  |  | 149 |  |  |  | 13,601 |
Grade 4 |  |  | 4,719 |  |  |  | 89 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,808 |
Total commercial real estate non-owner occupied loans |  |  | 329,172 |  |  |  | 209,503 |  |  |  | 110,782 |  |  |  | 89,871 |  |  |  | 90,883 |  |  |  | 123,138 |  |  |  | 17,809 |  |  |  | 971,158 |
Construction and development < 60 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 115,399 |  |  |  | 56,369 |  |  |  | 12,821 |  |  |  | 4,582 |  |  |  | 1,438 |  |  |  | 2,048 |  |  |  | 7,850 |  |  |  | 200,507 |
Grade 2 |  |  | 11,528 |  |  |  | 10,002 |  |  |  | 1,589 |  |  |  | 764 |  |  |  | 157 |  |  |  | 540 |  |  |  | 582 |  |  |  | 25,162 |
Grade 3 |  |  | 3,842 |  |  |  | — |  |  |  | 9 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,851 |
Grade 4 |  |  | — |  |  |  | 64 |  |  |  | 9 |  |  |  | 22 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 95 |
Total construction and development < 60 months |  |  | 130,769 |  |  |  | 66,435 |  |  |  | 14,428 |  |  |  | 5,368 |  |  |  | 1,595 |  |  |  | 2,588 |  |  |  | 8,432 |  |  |  | 229,615 |
Construction residential real estate < 60 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 159,431 |  |  |  | 4,214 |  |  |  | 69 |  |  |  | 21 |  |  |  | 33 |  |  |  | 23 |  |  |  | 11,449 |  |  |  | 175,240 |
Grade 2 |  |  | 27,400 |  |  |  | 580 |  |  |  | 112 |  |  |  | — |  |  |  | — |  |  |  | 468 |  |  |  | 390 |  |  |  | 28,950 |
Grade 3 |  |  | 1,885 |  |  |  | 120 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,005 |
Total construction residential real estate < 60 months |  |  | 188,716 |  |  |  | 4,914 |  |  |  | 181 |  |  |  | 21 |  |  |  | 33 |  |  |  | 491 |  |  |  | 11,839 |  |  |  | 206,195 |
Residential real estate first lien |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 241,771 |  |  |  | 134,184 |  |  |  | 80,793 |  |  |  | 64,392 |  |  |  | 48,686 |  |  |  | 136,059 |  |  |  | — |  |  |  | 705,885 |
Grade 2 |  |  | 28,305 |  |  |  | 19,425 |  |  |  | 21,742 |  |  |  | 11,666 |  |  |  | 12,365 |  |  |  | 34,312 |  |  |  | — |  |  |  | 127,815 |
Grade 3 |  |  | 2,754 |  |  |  | 2,029 |  |  |  | 1,375 |  |  |  | 2,073 |  |  |  | 1,213 |  |  |  | 5,194 |  |  |  | — |  |  |  | 14,638 |
Grade 4 |  |  | 730 |  |  |  | 733 |  |  |  | 478 |  |  |  | 210 |  |  |  | 1,186 |  |  |  | 1,590 |  |  |  | — |  |  |  | 4,927 |
Grade 5 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 51 |  |  |  | — |  |  |  | — |  |  |  | 51 |
Total residential real estate first lien |  |  | 273,560 |  |  |  | 156,371 |  |  |  | 104,388 |  |  |  | 78,341 |  |  |  | 63,501 |  |  |  | 177,155 |  |  |  | — |  |  |  | 853,316 |
Residential real estate all other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 21,493 |  |  |  | 13,944 |  |  |  | 10,854 |  |  |  | 6,265 |  |  |  | 5,381 |  |  |  | 10,984 |  |  |  | 28,047 |  |  |  | 96,968 |
Grade 2 |  |  | 3,694 |  |  |  | 1,675 |  |  |  | 1,268 |  |  |  | 1,809 |  |  |  | 450 |  |  |  | 2,335 |  |  |  | 55,433 |  |  |  | 66,664 |
Grade 3 |  |  | 384 |  |  |  | 461 |  |  |  | 328 |  |  |  | 116 |  |  |  | 119 |  |  |  | 221 |  |  |  | 993 |  |  |  | 2,622 |
Grade 4 |  |  | 204 |  |  |  | 217 |  |  |  | 570 |  |  |  | 65 |  |  |  | 34 |  |  |  | 715 |  |  |  | 22 |  |  |  | 1,827 |
Total residential real estate all other |  |  | 25,775 |  |  |  | 16,297 |  |  |  | 13,020 |  |  |  | 8,255 |  |  |  | 5,984 |  |  |  | 14,255 |  |  |  | 84,495 |  |  |  | 168,081 |
Farmland |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 51,284 |  |  |  | 26,391 |  |  |  | 18,994 |  |  |  | 13,821 |  |  |  | 13,368 |  |  |  | 27,100 |  |  |  | 8,160 |  |  |  | 159,118 |
Grade 2 |  |  | 15,264 |  |  |  | 30,684 |  |  |  | 6,639 |  |  |  | 6,391 |  |  |  | 4,763 |  |  |  | 8,916 |  |  |  | 7,140 |  |  |  | 79,797 |
Grade 3 |  |  | 3,681 |  |  |  | 290 |  |  |  | 151 |  |  |  | 1,055 |  |  |  | 703 |  |  |  | 551 |  |  |  | 1,955 |  |  |  | 8,386 |
Grade 4 |  |  | 414 |  |  |  | 14 |  |  |  | 4,058 |  |  |  | 296 |  |  |  | 340 |  |  |  | 223 |  |  |  | 312 |  |  |  | 5,657 |
Total farmland |  |  | 70,643 |  |  |  | 57,379 |  |  |  | 29,842 |  |  |  | 21,563 |  |  |  | 19,174 |  |  |  | 36,790 |  |  |  | 17,567 |  |  |  | 252,958 |
Commercial and agricultural non-real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 206,515 |  |  |  | 136,254 |  |  |  | 124,657 |  |  |  | 74,719 |  |  |  | 46,453 |  |  |  | 33,471 |  |  |  | 270,426 |  |  |  | 892,495 |
Grade 2 |  |  | 49,467 |  |  |  | 34,659 |  |  |  | 27,239 |  |  |  | 6,566 |  |  |  | 7,054 |  |  |  | 22,710 |  |  |  | 63,894 |  |  |  | 211,589 |
Grade 3 |  |  | 24,793 |  |  |  | 1,511 |  |  |  | 1,466 |  |  |  | 789 |  |  |  | 271 |  |  |  | 327 |  |  |  | 14,577 |  |  |  | 43,734 |
Grade 4 |  |  | 7,231 |  |  |  | 1,607 |  |  |  | 652 |  |  |  | 241 |  |  |  | 1,139 |  |  |  | 163 |  |  |  | 959 |  |  |  | 11,992 |
Total commercial and agricultural non-real estate |  |  | 288,006 |  |  |  | 174,031 |  |  |  | 154,014 |  |  |  | 82,315 |  |  |  | 54,917 |  |  |  | 56,671 |  |  |  | 349,856 |  |  |  | 1,159,810 |
Consumer non-real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 166,934 |  |  |  | 93,232 |  |  |  | 41,449 |  |  |  | 13,157 |  |  |  | 4,471 |  |  |  | 1,768 |  |  |  | 7,673 |  |  |  | 328,684 |
Grade 2 |  |  | 12,773 |  |  |  | 5,902 |  |  |  | 3,399 |  |  |  | 796 |  |  |  | 499 |  |  |  | 266 |  |  |  | 328 |  |  |  | 23,963 |
Grade 3 |  |  | 445 |  |  |  | 840 |  |  |  | 450 |  |  |  | 175 |  |  |  | 75 |  |  |  | 63 |  |  |  | 2 |  |  |  | 2,050 |
Grade 4 |  |  | 89 |  |  |  | 287 |  |  |  | 144 |  |  |  | 94 |  |  |  | 47 |  |  |  | 40 |  |  |  | 7 |  |  |  | 708 |
Total consumer non-real estate |  |  | 180,241 |  |  |  | 100,261 |  |  |  | 45,442 |  |  |  | 14,222 |  |  |  | 5,092 |  |  |  | 2,137 |  |  |  | 8,010 |  |  |  | 355,405 |
Oil and gas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 104,622 |  |  |  | 66 |  |  |  | 82 |  |  |  | — |  |  |  | — |  |  |  | 4,679 |  |  |  | 16,529 |  |  |  | 125,978 |
Grade 2 |  |  | 42,713 |  |  |  | 745 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 9,919 |  |  |  | 53,377 |
Total oil and gas |  |  | 147,335 |  |  |  | 811 |  |  |  | 82 |  |  |  | — |  |  |  | — |  |  |  | 4,679 |  |  |  | 26,448 |  |  |  | 179,355 |
Other loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 685,426 |  |  |  | 32,392 |  |  |  | 25,707 |  |  |  | 20,638 |  |  |  | 16,378 |  |  |  | 10,341 |  |  |  | 22,976 |  |  |  | 813,858 |
Grade 2 |  |  | — |  |  |  | — |  |  |  | 17 |  |  |  | 2,936 |  |  |  | 1,126 |  |  |  | 2,179 |  |  |  | 692 |  |  |  | 6,950 |
Grade 3 |  |  | — |  |  |  | — |  |  |  | 78 |  |  |  | — |  |  |  | 53 |  |  |  | 67 |  |  |  | 36 |  |  |  | 234 |
Grade 4 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 124 |  |  |  | 208 |  |  |  | 33 |  |  |  | 671 |  |  |  | 1,036 |
Total other loans |  |  | 685,426 |  |  |  | 32,392 |  |  |  | 25,802 |  |  |  | 23,698 |  |  |  | 17,765 |  |  |  | 12,620 |  |  |  | 24,375 |  |  |  | 822,078 |
Pegasus Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grade 1 |  |  | 100,631 |  |  |  | 66,875 |  |  |  | 27,235 |  |  |  | 19,025 |  |  |  | 12,414 |  |  |  | 44,237 |  |  |  | 113,824 |  |  |  | 384,241 |
Grade 2 |  |  | 28,187 |  |  |  | 26,733 |  |  |  | 6,774 |  |  |  | 23,367 |  |  |  | 3,822 |  |  |  | 5,300 |  |  |  | 74,671 |  |  |  | 168,854 |
Grade 3 |  |  | 123 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,330 |  |  |  | — |  |  |  | 1,453 |
Total Pegasus Bank |  |  | 128,941 |  |  |  | 93,608 |  |  |  | 34,009 |  |  |  | 42,392 |  |  |  | 16,236 |  |  |  | 50,867 |  |  |  | 188,495 |  |  |  | 554,548 |
Total loans held for investment |  | $ | 2,637,796 |  |  | $ | 1,034,907 |  |  | $ | 618,426 |  |  | $ | 418,683 |  |  | $ | 327,103 |  |  | $ | 598,412 |  |  | $ | 759,179 |  |  | $ | 6,394,506 |
The following table presents internal loan grading by class of loans as of December 31, 2019:
|  | Internal Loan Grading |
|  | Grade |
|  |  | 1 |  |  |  | 2 |  |  |  | 3 |  |  |  | 4 |  |  |  | 5 |  |  | Total |
|  | (Dollars in thousands) |
As of December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-residential real estate owner occupied |  | $ | 554,942 |  |  | $ | 130,783 |  |  | $ | 15,191 |  |  | $ | 6,500 |  |  | $ | — |  |  | $ | 707,416 |
Non-residential real estate other |  |  | 861,108 |  |  |  | 252,134 |  |  |  | 23,048 |  |  |  | 868 |  |  |  | 17 |  |  |  | 1,137,175 |
Residential real estate permanent mortgage |  |  | 289,350 |  |  |  | 41,754 |  |  |  | 6,975 |  |  |  | 2,442 |  |  |  | 51 |  |  |  | 340,572 |
Residential real estate other |  |  | 722,983 |  |  |  | 179,951 |  |  |  | 14,382 |  |  |  | 3,446 |  |  |  | 70 |  |  |  | 920,832 |
Non-consumer non-real estate |  |  | 1,166,155 |  |  |  | 261,003 |  |  |  | 25,276 |  |  |  | 1,959 |  |  |  | — |  |  |  | 1,454,393 |
Consumer other |  |  | 335,916 |  |  |  | 23,407 |  |  |  | 2,327 |  |  |  | 704 |  |  |  | — |  |  |  | 362,354 |
Other loans |  |  | 148,692 |  |  |  | 3,631 |  |  |  | 1,564 |  |  |  | 128 |  |  |  | — |  |  |  | 154,015 |
Acquired loans |  |  | 88,205 |  |  |  | 55,087 |  |  |  | 6,800 |  |  |  | 4,446 |  |  |  | 143 |  |  |  | 154,681 |
Pegasus Bank |  |  | 295,243 |  |  |  | 133,324 |  |  |  | 1,287 |  |  |  | 851 |  |  |  | — |  |  |  | 430,705 |
Total |  | $ | 4,462,594 |  |  | $ | 1,081,074 |  |  | $ | 96,850 |  |  | $ | 21,344 |  |  | $ | 281 |  |  | $ | 5,662,143 |
Activity in Allowance for Credit Losses on Loans | The following table details activity in the allowance for credit losses on loans for the period presented. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.
|  | Allowance for Credit Losses |
|  | Balance at beginning of period |  |  | Impact of CECL adoption |  |  | Initial allowance on loans purchased with credit deterioration |  |  | Charge- offs |  |  | Recoveries |  |  | Net charge-offs |  |  | Provision for credit losses on loans |  |  | Balance at end of period |
|  | (Dollars in thousands) |
Year ended December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate owner occupied |  | $ | 5,625 |  |  | $ | (2,806 | ) |  | $ | 432 |  |  | $ | (773 | ) |  | $ | 10 |  |  | $ | (763 | ) |  | $ | 4,547 |  |  | $ | 7,035 |
Commercial real estate non-owner occupied |  |  | 8,358 |  |  |  | (5,507 | ) |  |  | — |  |  |  | (3,609 | ) |  |  | — |  |  |  | (3,609 | ) |  |  | 12,600 |  |  |  | 11,842 |
Construction and development < 60 months |  |  | 2,214 |  |  |  | (1,056 | ) |  |  | — |  |  |  | (59 | ) |  |  | 123 |  |  |  | 64 |  |  |  | 1,338 |  |  |  | 2,560 |
Construction residential real estate < 60 months |  |  | 1,933 |  |  |  | (778 | ) |  |  | — |  |  |  | (29 | ) |  |  | — |  |  |  | (29 | ) |  |  | (499 | ) |  |  | 627 |
Residential real estate first lien |  |  | 8,692 |  |  |  | (3,831 | ) |  |  | 7 |  |  |  | (465 | ) |  |  | 44 |  |  |  | (421 | ) |  |  | (1,877 | ) |  |  | 2,570 |
Residential real estate all other |  |  | 2,767 |  |  |  | (1,408 | ) |  |  | — |  |  |  | (126 | ) |  |  | 54 |  |  |  | (72 | ) |  |  | 943 |  |  |  | 2,230 |
Farmland |  |  | 2,821 |  |  |  | (1,408 | ) |  |  | 1 |  |  |  | (2,055 | ) |  |  | — |  |  |  | (2,055 | ) |  |  | 3,777 |  |  |  | 3,136 |
Commercial and agricultural non-real estate |  |  | 13,462 |  |  |  | 13,195 |  |  |  | 62 |  |  |  | (3,320 | ) |  |  | 116 |  |  |  | (3,204 | ) |  |  | 8,885 |  |  |  | 32,400 |
Consumer non-real estate |  |  | 3,252 |  |  |  | (622 | ) |  |  | — |  |  |  | (1,142 | ) |  |  | 224 |  |  |  | (918 | ) |  |  | 1,665 |  |  |  | 3,377 |
Oil and gas |  |  | 1,883 |  |  |  | (1,346 | ) |  |  | — |  |  |  | (11,245 | ) |  |  | — |  |  |  | (11,245 | ) |  |  | 28,559 |  |  |  | 17,851 |
Other loans |  |  | 2,632 |  |  |  | (116 | ) |  |  | — |  |  |  | (168 | ) |  |  | 10 |  |  |  | (158 | ) |  |  | 824 |  |  |  | 3,182 |
Pegasus Bank |  |  | 599 |  |  |  | 2,488 |  |  |  | — |  |  |  | (841 | ) |  |  | 424 |  |  |  | (417 | ) |  |  | 1,886 |  |  |  | 4,556 |
Total |  | $ | 54,238 |  |  | $ | (3,195 | ) |  | $ | 502 |  |  | $ | (23,832 | ) |  | $ | 1,005 |  |  | $ | (22,827 | ) |  | $ | 62,648 |  |  | $ | 91,366 |
Year ended December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-residential real estate owner occupied |  | $ | 6,328 |  |  | $ | — |  |  | $ | — |  |  | $ | (34 | ) |  | $ | 25 |  |  | $ | (9 | ) |  | $ | 721 |  |  | $ | 7,040 |
Non-residential real estate other |  |  | 11,027 |  |  |  | — |  |  |  | — |  |  |  | (67 | ) |  |  | 42 |  |  |  | (25 | ) |  |  | 155 |  |  |  | 11,157 |
Residential real estate permanent mortgage |  |  | 3,261 |  |  |  | — |  |  |  | — |  |  |  | (146 | ) |  |  | 22 |  |  |  | (124 | ) |  |  | 250 |  |  |  | 3,387 |
Residential real estate other |  |  | 10,673 |  |  |  | — |  |  |  | — |  |  |  | (2,697 | ) |  |  | 30 |  |  |  | (2,667 | ) |  |  | 2,143 |  |  |  | 10,149 |
Non-consumer non-real estate |  |  | 13,151 |  |  |  | — |  |  |  | — |  |  |  | (514 | ) |  |  | 272 |  |  |  | (242 | ) |  |  | 2,432 |  |  |  | 15,341 |
Consumer other |  |  | 3,065 |  |  |  | — |  |  |  | — |  |  |  | (868 | ) |  |  | 218 |  |  |  | (650 | ) |  |  | 904 |  |  |  | 3,319 |
Other loans |  |  | 2,423 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 90 |  |  |  | 90 |  |  |  | 119 |  |  |  | 2,632 |
Acquired loans |  |  | 1,461 |  |  |  | — |  |  |  | — |  |  |  | (2,060 | ) |  |  | 219 |  |  |  | (1,841 | ) |  |  | 994 |  |  |  | 614 |
Pegasus Bank |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 30 |  |  |  | 30 |  |  |  | 569 |  |  |  | 599 |
Total |  | $ | 51,389 |  |  | $ | — |  |  | $ | — |  |  | $ | (6,386 | ) |  | $ | 948 |  |  | $ | (5,438 | ) |  | $ | 8,287 |  |  | $ | 54,238 |
Allowance for Credit Losses Outstanding by Impairment Methodology | The following table details the amount of allowance for credit losses by class of loans for the period presented, on the basis of impairment methodology used by the Company.
|  | Allowance for Credit Losses |
|  | December 31, 2019 |
|  | Individually evaluated for impairment |  |  | Collectively evaluated for impairment |
|  | (Dollars in thousands) |
BancFirst |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |
Non-residential real estate owner occupied |  | $ | 900 |  |  | $ | 6,140 |
Non-residential real estate other |  |  | 990 |  |  |  | 10,167 |
Residential real estate permanent mortgage |  |  | 531 |  |  |  | 2,856 |
Residential real estate other |  |  | 2,026 |  |  |  | 8,123 |
Non-consumer non-real estate |  |  | 2,902 |  |  |  | 12,439 |
Consumer other |  |  | 343 |  |  |  | 2,976 |
Other loans |  |  | 13 |  |  |  | 2,619 |
Acquired loans |  |  | — |  |  |  | 614 |
Pegasus Bank |  |  | — |  |  |  | 599 |
Total |  | $ | 7,705 |  |  | $ | 46,533 |
Loans Outstanding by Impairment Methodology | The following table details the loans outstanding by class of loans for the period presented, on the basis of the impairment methodology used by the Company
|  | Loans |
|  | December 31, 2019 |
|  | Individually evaluated for impairment |  |  | Collectively evaluated for impairment |  |  | Loans acquired with deteriorated credit quality |
|  | (Dollars in thousands) |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
Non-residential real estate owner occupied |  | $ | 21,690 |  |  | $ | 685,726 |  |  | $ | — |
Non-residential real estate other |  |  | 23,933 |  |  |  | 1,113,242 |  |  |  | — |
Residential real estate permanent mortgage |  |  | 9,468 |  |  |  | 331,104 |  |  |  | — |
Residential real estate other |  |  | 17,898 |  |  |  | 902,934 |  |  |  | — |
Non-consumer non-real estate |  |  | 27,016 |  |  |  | 1,427,377 |  |  |  | — |
Consumer other |  |  | 3,090 |  |  |  | 359,264 |  |  |  | — |
Other loans |  |  | 231 |  |  |  | 153,784 |  |  |  | — |
Acquired loans |  |  | 10,470 |  |  |  | 143,351 |  |  |  | 860 |
Pegasus Bank |  |  | — |  |  |  | 428,567 |  |  |  | 2,138 |
Total |  | $ | 113,796 |  |  | $ | 5,545,349 |  |  | $ | 2,998 |
Purchased Credit Deteriorated Loans | The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The purchased credit deteriorated loans for the period are as follows:
|  | Loans acquired with deteriorated credit quality |
|  | (Dollars in thousands) |
For the year ended December 31, 2020 |  |  |  |
Purchase price of loans at acquisition |  | $ | 1,761 |
Allowance for credit losses at acquisition |  |  | 502 |
Par value of acquired loans at acquisition |  | $ | 2,263 |
Collateral-Dependent Gross Loans Held for Investment by Collateral Type and Related Specific Allocation | The following table summarizes collateral-dependent gross loans held for investment by collateral type and the related specific allocation as follows:
|  | Collateral Type |  |  |  |  |  |  |  |  |
|  | Real Estate |  |  | Business Assets |  |  | Energy Reserves |  |  | Other Assets |  |  | Total |  |  | Specific Allocation |
As of December 31, 2020 |  | (Dollars in thousands) |  |  |  |  |  |  |  |  |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate owner occupied |  | $ | 848 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 848 |  |  | $ | 226 |
Commercial real estate non-owner occupied |  |  | 4,719 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,719 |  |  |  | 1,000 |
Construction and development < 60 months |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Construction residential real estate < 60 months |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Residential real estate first lien |  |  | 860 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 860 |  |  |  | 151 |
Residential real estate all other |  |  | 866 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 866 |  |  |  | 616 |
Farmland |  |  | 3,258 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,258 |  |  |  | 1,114 |
Commercial and agricultural non-real estate |  |  | — |  |  |  | 8,460 |  |  |  | — |  |  |  | 413 |  |  |  | 8,873 |  |  |  | 2,813 |
Consumer non-real estate |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 109 |  |  |  | 109 |  |  |  | 58 |
Oil and gas |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Other loans |  |  | — |  |  |  | 13 |  |  |  | — |  |  |  | — |  |  |  | 13 |  |  |  | 12 |
Pegasus Bank |  |  | 1,257 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,257 |  |  |  | 222 |
Total collateral-dependent loans held for investment |  | $ | 11,808 |  |  | $ | 8,473 |  |  | $ | — |  |  | $ | 522 |  |  | $ | 20,803 |  |  | $ | 6,212 |
Impaired Loans Segregated by Class of Loans | The following table presents impaired loans, segregated by class of loans.
|  | Impaired Loans |
|  | Unpaid Principal Balance |  |  | Recorded Investment with Allowance |  |  | Related Allowance |  |  | Average Recorded Investment |
|  | (Dollars in thousands) |
As of December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-residential real estate owner occupied |  | $ | 13,253 |  |  | $ | 13,000 |  |  | $ | 514 |  |  | $ | 12,868 |
Non-residential real estate other |  |  | 3,973 |  |  |  | 3,678 |  |  |  | 300 |  |  |  | 3,946 |
Residential real estate permanent mortgage |  |  | 3,445 |  |  |  | 3,129 |  |  |  | 242 |  |  |  | 2,968 |
Residential real estate other |  |  | 7,117 |  |  |  | 4,487 |  |  |  | 946 |  |  |  | 5,567 |
Non-consumer non-real estate |  |  | 11,598 |  |  |  | 11,012 |  |  |  | 1,005 |  |  |  | 11,085 |
Consumer other |  |  | 969 |  |  |  | 836 |  |  |  | 97 |  |  |  | 844 |
Other loans |  |  | 5,711 |  |  |  | 5,510 |  |  |  | 105 |  |  |  | 1,130 |
Acquired loans |  |  | 6,421 |  |  |  | 5,108 |  |  |  | 2 |  |  |  | 5,472 |
Pegasus Bank |  |  | 2,960 |  |  |  | 2,138 |  |  |  | — |  |  |  | 2,161 |
Total |  | $ | 55,447 |  |  | $ | 48,898 |  |  | $ | 3,211 |  |  | $ | 46,041 |
Transfers from Loans and Premises and Equipment to Other Real Estate Owned, Repossessed Assets and Other Assets | Transfers from loans and premises and equipment to other real estate owned, repossessed assets, and other assets during the periods presented are summarized as follows:
|  | Year ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | (Dollars in thousands) |
Other real estate owned |  | $ | 32,093 |  |  | $ | 3,941 |  |  | $ | 5,437 |
Repossessed assets |  |  | 1,418 |  |  |  | 1,473 |  |  |  | 1,122 |
Other assets |  |  | 11,105 |  |  |  | — |  |  |  | — |
Total |  | $ | 44,616 |  |  | $ | 5,414 |  |  | $ | 6,559 |
Related Party Loans | A summary of these loans is as follows:
Year Ended December 31, |  | Balance Beginning of the Period |  |  | Additions |  |  | Collections/ Terminations |  |  | Balance End of the Period |
|  | (Dollars in thousands) |
2020 |  | $ | 20,281 |  |  | $ | 19,682 |  |  | $ | (17,906 | ) |  | $ | 22,057 |
2019 |  |  | 19,891 |  |  |  | 12,371 |  |  |  | (11,981 | ) |  |  | 20,281 |
2018 |  |  | 24,001 |  |  |  | 7,986 |  |  |  | (12,096 | ) |  |  | 19,891 |

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- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953659-111524 + Details
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- Definition Tabular disclosure of impaired financing receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524 + Details
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- Definition Tabular disclosure of aging analysis for financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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