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Allowance for Credit Losses - Aggregated analysis of the changes in allowance for loan losses Details (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Allowance for loan losses: |  |  |
Balance at beginning of period | $ 56,927 | $ 55,798 |
Charge-offs | (3,223) | (1,619) |
Recoveries | 1,909 | 958 |
Provision (benefit) | 34,734 | 1,488 |
Balance at end of period | 144,785 | 56,522 |
Loans individually evaluated for impairment | 1,312 |  |
Loans collectively evaluated for impairment | $ 79,251 |  |
Loans |  |  |
Total loans |  | 11,146,122 | $ 11,375,104
Real estate | Consumer |  |  |
Loans |  |  |
Total loans |  | 3,523,157 | 3,464,980
Construction and land development |  |  |
Loans |  |  |
Total loans |  | 946,503 | 1,017,261
Commercial non-owner occupied | Commercial loans |  |  |
Loans |  |  |
Total loans |  | 2,329,449 | 2,323,967
Commercial owner occupied real estate loan | Commercial loans |  |  |
Loans |  |  |
Total loans |  | 2,086,662 | 2,158,701
Consumer Owner Occupied Loans |  |  |
Loans |  |  |
Total loans |  | 2,731,499 | 2,706,960
Home equity loans | Consumer |  |  |
Loans |  |  |
Total loans |  | 791,658 | 758,020
Commercial and industrial | Commercial loans |  |  |
Loans |  |  |
Total loans |  | 1,251,719 | 1,386,327
Other income producing property |  |  |
Loans |  |  |
Total loans |  | 380,177 | 346,554
Consumer | Consumer |  |  |
Loans |  |  |
Total loans |  | 610,231 | 663,422
Other loans | Commercial loans |  |  |
Loans |  |  |
Total loans |  | 18,224 | 13,892
Non-acquired loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 51,194 |
Charge-offs |  | (1,245) |
Recoveries |  | 752 |
Provision (benefit) |  | 1,307 |
Balance at end of period |  | 52,008 |
Loans individually evaluated for impairment |  | 1,599 |
Loans collectively evaluated for impairment |  | 50,409 |
Loans |  |  |
Loans individually evaluated for impairment |  | 56,273 |
Loans collectively evaluated for impairment |  | 8,254,340 |
Total loans |  | 8,310,613 | 9,252,831
Non-acquired loans | Commercial loans |  |  |
Loans |  |  |
Total loans |  | 5,313,632 | 6,062,991
Non-acquired loans | Consumer |  |  |
Loans |  |  |
Total loans |  | 2,996,981 | 3,189,840
Non-acquired loans | Real estate | Consumer |  |  |
Loans |  |  |
Total loans |  | 2,513,640 | 2,637,467
Non-acquired loans | Construction and land development | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 5,682 |
Recoveries |  | 299 |
Provision (benefit) |  | (610) |
Balance at end of period |  | 5,371 |
Loans individually evaluated for impairment |  | 786 |
Loans collectively evaluated for impairment |  | 4,585 |
Loans |  |  |
Loans individually evaluated for impairment |  | 38,257 |
Loans collectively evaluated for impairment |  | 772,294 |
Total loans |  | 810,551 | 968,360
Non-acquired loans | Commercial non-owner occupied | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 8,754 |
Recoveries |  | 22 |
Provision (benefit) |  | 964 |
Balance at end of period |  | 9,740 |
Loans individually evaluated for impairment |  | 60 |
Loans collectively evaluated for impairment |  | 9,680 |
Loans |  |  |
Loans individually evaluated for impairment |  | 375 |
Loans collectively evaluated for impairment |  | 1,615,041 |
Total loans |  | 1,615,416 | 1,811,138
Non-acquired loans | Commercial owner occupied real estate loan | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 9,369 |
Charge-offs |  | (12) |
Recoveries |  | 25 |
Provision (benefit) |  | 247 |
Balance at end of period |  | 9,629 |
Loans individually evaluated for impairment |  | 21 |
Loans collectively evaluated for impairment |  | 9,608 |
Loans |  |  |
Loans individually evaluated for impairment |  | 4,220 |
Loans collectively evaluated for impairment |  | 1,597,140 |
Total loans |  | 1,601,360 | 1,784,017
Non-acquired loans | Consumer Owner Occupied Loans | Consumer |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 11,913 |
Charge-offs |  | (37) |
Recoveries |  | 2 |
Provision (benefit) |  | 180 |
Balance at end of period |  | 12,058 |
Loans individually evaluated for impairment |  | 37 |
Loans collectively evaluated for impairment |  | 12,021 |
Loans |  |  |
Loans individually evaluated for impairment |  | 6,885 |
Loans collectively evaluated for impairment |  | 1,998,429 |
Total loans |  | 2,005,314 | 2,118,839
Non-acquired loans | Home equity loans | Consumer |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 3,434 |
Charge-offs |  | (15) |
Recoveries |  | 36 |
Provision (benefit) |  | (182) |
Balance at end of period |  | 3,273 |
Loans individually evaluated for impairment |  | 161 |
Loans collectively evaluated for impairment |  | 3,112 |
Loans |  |  |
Loans individually evaluated for impairment |  | 2,754 |
Loans collectively evaluated for impairment |  | 505,572 |
Total loans |  | 508,326 | 518,628
Non-acquired loans | Commercial and industrial | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 7,454 |
Charge-offs |  | (19) |
Recoveries |  | 71 |
Provision (benefit) |  | (257) |
Balance at end of period |  | 7,249 |
Loans individually evaluated for impairment |  | 420 |
Loans collectively evaluated for impairment |  | 6,829 |
Loans |  |  |
Loans individually evaluated for impairment |  | 1,315 |
Loans collectively evaluated for impairment |  | 1,070,755 |
Total loans |  | 1,072,070 | 1,280,859
Non-acquired loans | Other income producing property |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 1,446 |
Recoveries |  | 45 |
Provision (benefit) |  | (104) |
Balance at end of period |  | 1,387 |
Loans individually evaluated for impairment |  | 111 |
Loans collectively evaluated for impairment |  | 1,276 |
Loans |  |  |
Loans individually evaluated for impairment |  | 2,357 |
Loans collectively evaluated for impairment |  | 211,878 |
Total loans |  | 214,235 | 218,617
Non-acquired loans | Consumer | Consumer |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 3,101 |
Charge-offs |  | (1,162) |
Recoveries |  | 252 |
Provision (benefit) |  | 1,004 |
Balance at end of period |  | 3,195 |
Loans individually evaluated for impairment |  | 3 |
Loans collectively evaluated for impairment |  | 3,192 |
Loans |  |  |
Loans individually evaluated for impairment |  | 110 |
Loans collectively evaluated for impairment |  | 465,007 |
Total loans |  | 465,117 | 538,481
Non-acquired loans | Other loans | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 41 |
Provision (benefit) |  | 65 |
Balance at end of period |  | 106 |
Loans collectively evaluated for impairment |  | 106 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 18,224 |
Total loans |  | 18,224 | 13,892
Non-acquired loans | Other loans | Consumer |  |  |
Loans |  |  |
Total loans |  | 18,224 | 13,892
Acquired non-credit impaired loans |  |  |
Allowance for loan losses: |  |  |
Charge-offs |  | (374) |
Recoveries |  | 206 |
Provision (benefit) |  | 168 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 2,378,737 |
Total loans |  | 2,378,737 | 1,760,427
Acquired non-credit impaired loans | Commercial loans |  |  |
Loans |  |  |
Total loans |  | 1,438,160 | 985,780
Acquired non-credit impaired loans | Consumer |  |  |
Loans |  |  |
Total loans |  | 940,577 | 774,647
Acquired non-credit impaired loans | Real estate | Consumer |  |  |
Loans |  |  |
Total loans |  | 835,654 | 685,163
Acquired non-credit impaired loans | Construction and land development | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Charge-offs |  | (6) |
Recoveries |  | 1 |
Provision (benefit) |  | 5 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 113,572 |
Total loans |  | 113,572 | 33,569
Acquired non-credit impaired loans | Commercial non-owner occupied | Commercial loans |  |  |
Loans |  |  |
Loans collectively evaluated for impairment |  | 629,394 |
Total loans |  | 629,394 | 447,441
Acquired non-credit impaired loans | Commercial owner occupied real estate loan | Commercial loans |  |  |
Loans |  |  |
Loans collectively evaluated for impairment |  | 400,658 |
Total loans |  | 400,658 | 307,193
Acquired non-credit impaired loans | Consumer Owner Occupied Loans | Consumer |  |  |
Allowance for loan losses: |  |  |
Recoveries |  | 2 |
Provision (benefit) |  | (2) |
Loans |  |  |
Loans collectively evaluated for impairment |  | 610,376 |
Total loans |  | 610,376 | 496,431
Acquired non-credit impaired loans | Home equity loans | Consumer |  |  |
Allowance for loan losses: |  |  |
Charge-offs |  | (72) |
Recoveries |  | 22 |
Provision (benefit) |  | 50 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 225,278 |
Total loans |  | 225,278 | 188,732
Acquired non-credit impaired loans | Commercial and industrial | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Charge-offs |  | (134) |
Recoveries |  | 165 |
Provision (benefit) |  | (31) |
Loans |  |  |
Loans collectively evaluated for impairment |  | 173,840 |
Total loans |  | 173,840 | 101,880
Acquired non-credit impaired loans | Other income producing property |  |  |
Loans |  |  |
Total loans |  | 120,696 | 95,697
Acquired non-credit impaired loans | Other income producing property | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Charge-offs |  | (26) |
Provision (benefit) |  | 26 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 120,696 |
Total loans |  | 120,696 | 95,697
Acquired non-credit impaired loans | Consumer | Consumer |  |  |
Allowance for loan losses: |  |  |
Charge-offs |  | (136) |
Recoveries |  | 16 |
Provision (benefit) |  | 120 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 104,923 |
Total loans |  | 104,923 | 89,484
Acquired credit impaired loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 4,604 |
Provision (benefit) |  | 13 |
Reduction due to loan removals |  | (103) |
Balance at end of period |  | 4,514 |
Loans collectively evaluated for impairment |  | 4,514 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 456,772 |
Total loans |  | 456,772 | 361,846
Acquired credit impaired loans | Real estate | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 801 |
Provision (benefit) |  | 51 |
Reduction due to loan removals |  | (5) |
Balance at end of period |  | 847 |
Loans collectively evaluated for impairment |  | 847 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 173,707 |
Total loans |  | 173,707 | 130,938
Acquired credit impaired loans | Real estate | Consumer |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 2,246 |
Provision (benefit) |  | 16 |
Reduction due to loan removals |  | (98) |
Balance at end of period |  | 2,164 |
Loans collectively evaluated for impairment |  | 2,164 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 199,701 |
Total loans |  | 199,701 | 163,359
Acquired credit impaired loans | Construction and land development | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 717 |
Balance at end of period |  | 717 |
Loans collectively evaluated for impairment |  | 717 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 32,257 |
Total loans |  | 32,257 | 25,032
Acquired credit impaired loans | Commercial and industrial | Commercial loans |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 79 |
Balance at end of period |  | 79 |
Loans collectively evaluated for impairment |  | 79 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 10,925 |
Total loans |  | 10,925 | 7,029
Acquired credit impaired loans | Consumer | Consumer |  |  |
Allowance for loan losses: |  |  |
Balance at beginning of period |  | 761 |
Provision (benefit) |  | (54) |
Balance at end of period |  | 707 |
Loans collectively evaluated for impairment |  | 707 |
Loans |  |  |
Loans collectively evaluated for impairment |  | 40,182 |
Total loans |  | $ 40,182 | $ 35,488

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