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Allowance for Credit Losses (ACL) - Aggregated analysis of the changes in allowance for loan losses Details (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2020 | Mar. 31, 2020
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period | $ 457,309,000 | $ 56,927,000 |  |  |
Charge-offs | (16,899,000) | (14,602,000) |  |  |
Recoveries | 13,800,000 | 11,777,000 |  |  |
(Recovery) provision | (152,403,000) | 89,923,000 |  |  |
Balance at end of period | 301,807,000 | 457,309,000 | $ 56,927,000 |  |
Loans individually evaluated for impairment | 2,464,000 | 1,249,000 |  |  |
Loans collectively evaluated for impairment | 292,210,000 | 415,929,000 |  |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  |  | $ 1,000,000.0 | $ 500,000
Total loans | 23,928,166,000 | 24,664,134,000 |  |  |
Construction and land development | Commercial loans |  |  |  |  |
Loans |  |  |  |  |
Total loans | 2,029,216,000 | 1,890,846,000 |  |  |
Commercial non-owner occupied | Commercial loans |  |  |  |  |
Loans |  |  |  |  |
Total loans | 6,735,699,000 | 6,152,246,000 |  |  |
Consumer Owner Occupied Loans | Consumer portfolio loans |  |  |  |  |
Loans |  |  |  |  |
Total loans | 3,638,364,000 | 3,682,667,000 |  |  |
Home equity loans | Consumer portfolio loans |  |  |  |  |
Loans |  |  |  |  |
Total loans | 1,168,594,000 | 1,292,141,000 |  |  |
Commercial and industrial | Commercial loans |  |  |  |  |
Loans |  |  |  |  |
Total loans | 3,761,133,000 | 5,046,310,000 |  |  |
Other income producing property | Commercial loans |  |  |  |  |
Loans |  |  |  |  |
Total loans | 696,804,000 | 854,900,000 |  |  |
Consumer loans | Consumer portfolio loans |  |  |  |  |
Loans |  |  |  |  |
Total loans | 904,657,000 | 894,334,000 |  |  |
Other loans | Consumer portfolio loans |  |  |  |  |
Loans |  |  |  |  |
Total loans | 23,583,000 | 17,993,000 |  |  |
Non-acquired loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 56,927,000 | 51,194,000 |  |
Charge-offs |  |  | (6,917,000) |  |
Recoveries |  |  | 3,367,000 |  |
(Recovery) provision |  |  | 9,283,000 |  |
Balance at end of period |  |  | 56,927,000 |  |
Loans individually evaluated for impairment |  |  | 1,346,000 |  |
Loans collectively evaluated for impairment |  |  | 55,581,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 58,532,000 |  |
Loans collectively evaluated for impairment |  |  | 9,194,299,000 |  |
Total loans |  |  | 9,252,831,000 |  |
Non-acquired loans | Construction and land development |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 6,104,000 | 5,682,000 |  |
Charge-offs |  |  | (78,000) |  |
Recoveries |  |  | 1,016,000 |  |
(Recovery) provision |  |  | (516,000) |  |
Balance at end of period |  |  | 6,104,000 |  |
Loans individually evaluated for impairment |  |  | 617,000 |  |
Loans collectively evaluated for impairment |  |  | 5,487,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 35,201,000 |  |
Loans collectively evaluated for impairment |  |  | 933,159,000 |  |
Total loans |  |  | 968,360,000 |  |
Non-acquired loans | Commercial non-owner occupied |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 10,699,000 | 8,754,000 |  |
Charge-offs |  |  | (3,000) |  |
Recoveries |  |  | 76,000 |  |
(Recovery) provision |  |  | 1,872,000 |  |
Balance at end of period |  |  | 10,699,000 |  |
Loans collectively evaluated for impairment |  |  | 10,699,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 379,000 |  |
Loans collectively evaluated for impairment |  |  | 1,810,759,000 |  |
Total loans |  |  | 1,811,138,000 |  |
Non-acquired loans | Commercial owner occupied real estate loan |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 10,581,000 | 9,369,000 |  |
Charge-offs |  |  | (87,000) |  |
Recoveries |  |  | 174,000 |  |
(Recovery) provision |  |  | 1,125,000 |  |
Balance at end of period |  |  | 10,581,000 |  |
Loans individually evaluated for impairment |  |  | 24,000 |  |
Loans collectively evaluated for impairment |  |  | 10,557,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 6,575,000 |  |
Loans collectively evaluated for impairment |  |  | 1,777,442,000 |  |
Total loans |  |  | 1,784,017,000 |  |
Non-acquired loans | Consumer Owner Occupied Loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 12,596,000 | 11,913,000 |  |
Charge-offs |  |  | (50,000) |  |
Recoveries |  |  | 213,000 |  |
(Recovery) provision |  |  | 520,000 |  |
Balance at end of period |  |  | 12,596,000 |  |
Loans individually evaluated for impairment |  |  | 102,000 |  |
Loans collectively evaluated for impairment |  |  | 12,494,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 5,141,000 |  |
Loans collectively evaluated for impairment |  |  | 2,113,698,000 |  |
Total loans |  |  | 2,118,839,000 |  |
Non-acquired loans | Home equity loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 3,188,000 | 3,434,000 |  |
Charge-offs |  |  | (203,000) |  |
Recoveries |  |  | 265,000 |  |
(Recovery) provision |  |  | (308,000) |  |
Balance at end of period |  |  | 3,188,000 |  |
Loans individually evaluated for impairment |  |  | 132,000 |  |
Loans collectively evaluated for impairment |  |  | 3,056,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 2,461,000 |  |
Loans collectively evaluated for impairment |  |  | 516,167,000 |  |
Total loans |  |  | 518,628,000 |  |
Non-acquired loans | Commercial and industrial |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 8,339,000 | 7,454,000 |  |
Charge-offs |  |  | (622,000) |  |
Recoveries |  |  | 351,000 |  |
(Recovery) provision |  |  | 1,156,000 |  |
Balance at end of period |  |  | 8,339,000 |  |
Loans individually evaluated for impairment |  |  | 366,000 |  |
Loans collectively evaluated for impairment |  |  | 7,973,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 6,578,000 |  |
Loans collectively evaluated for impairment |  |  | 1,274,281,000 |  |
Total loans |  |  | 1,280,859,000 |  |
Non-acquired loans | Other income producing property |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 1,336,000 | 1,446,000 |  |
Charge-offs |  |  | (31,000) |  |
Recoveries |  |  | 94,000 |  |
(Recovery) provision |  |  | (173,000) |  |
Balance at end of period |  |  | 1,336,000 |  |
Loans individually evaluated for impairment |  |  | 50,000 |  |
Loans collectively evaluated for impairment |  |  | 1,286,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 2,024,000 |  |
Loans collectively evaluated for impairment |  |  | 216,593,000 |  |
Total loans |  |  | 218,617,000 |  |
Non-acquired loans | Consumer loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 3,947,000 | 3,101,000 |  |
Charge-offs |  |  | (5,843,000) |  |
Recoveries |  |  | 1,178,000 |  |
(Recovery) provision |  |  | 5,511,000 |  |
Balance at end of period |  |  | 3,947,000 |  |
Loans individually evaluated for impairment |  |  | 55,000 |  |
Loans collectively evaluated for impairment |  |  | 3,892,000 |  |
Loans |  |  |  |  |
Loans individually evaluated for impairment |  |  | 173,000 |  |
Loans collectively evaluated for impairment |  |  | 538,308,000 |  |
Total loans |  |  | 538,481,000 |  |
Non-acquired loans | Other loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period |  | 137,000 | 41,000 |  |
(Recovery) provision |  |  | 96,000 |  |
Balance at end of period |  |  | 137,000 |  |
Loans collectively evaluated for impairment |  |  | 137,000 |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 13,892,000 |  |
Total loans |  |  | 13,892,000 |  |
Acquired non-credit impaired loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Charge-offs |  |  | (2,858,000) |  |
Recoveries |  |  | 547,000 |  |
(Recovery) provision |  |  | 2,311,000 |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 1,760,427,000 |  |
Total loans |  |  | 1,760,427,000 |  |
Acquired non-credit impaired loans | Construction and land development |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Charge-offs |  |  | (44,000) |  |
Recoveries |  |  | 3,000 |  |
(Recovery) provision |  |  | 41,000 |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 33,569,000 |  |
Total loans |  |  | 33,569,000 |  |
Acquired non-credit impaired loans | Commercial non-owner occupied |  |  |  |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 447,441,000 |  |
Total loans |  |  | 447,441,000 |  |
Acquired non-credit impaired loans | Commercial owner occupied real estate loan |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Charge-offs |  |  | (786,000) |  |
(Recovery) provision |  |  | 786,000 |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 307,193,000 |  |
Total loans |  |  | 307,193,000 |  |
Acquired non-credit impaired loans | Consumer Owner Occupied Loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Charge-offs |  |  | (6,000) |  |
Recoveries |  |  | 26,000 |  |
(Recovery) provision |  |  | (20,000) |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 496,431,000 |  |
Total loans |  |  | 496,431,000 |  |
Acquired non-credit impaired loans | Home equity loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Charge-offs |  |  | (263,000) |  |
Recoveries |  |  | 206,000 |  |
(Recovery) provision |  |  | 57,000 |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 188,732,000 |  |
Total loans |  |  | 188,732,000 |  |
Acquired non-credit impaired loans | Commercial and industrial |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Charge-offs |  |  | (1,289,000) |  |
Recoveries |  |  | 190,000 |  |
(Recovery) provision |  |  | 1,099,000 |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 101,880,000 |  |
Total loans |  |  | 101,880,000 |  |
Acquired non-credit impaired loans | Other income producing property |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Charge-offs |  |  | (26,000) |  |
Recoveries |  |  | 71,000 |  |
(Recovery) provision |  |  | (45,000) |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 95,697,000 |  |
Total loans |  |  | 95,697,000 |  |
Acquired non-credit impaired loans | Consumer loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Charge-offs |  |  | (444,000) |  |
Recoveries |  |  | 51,000 |  |
(Recovery) provision |  |  | 393,000 |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  |  | 89,484,000 |  |
Total loans |  |  | 89,484,000 |  |
Acquired credit impaired loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period | 5,064,000 |  | 4,604,000 |  |
(Recovery) provision |  | 1,183,000 |  |  |
Reduction due to loan removals |  | (723,000) |  |  |
Balance at end of period |  | 5,064,000 |  |  |
Loans collectively evaluated for impairment |  | 5,064,000 |  |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  | 361,846,000 |  |  |
Total loans |  | 361,846,000 |  |  |
Acquired credit impaired loans | Real estate | Commercial loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period | 1,377,000 |  | 801,000 |  |
(Recovery) provision |  | 577,000 |  |  |
Reduction due to loan removals |  | (1,000) |  |  |
Balance at end of period |  | 1,377,000 |  |  |
Loans collectively evaluated for impairment |  | 1,377,000 |  |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  | 130,938,000 |  |  |
Total loans |  | 130,938,000 |  |  |
Acquired credit impaired loans | Real estate | Consumer portfolio loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period | 2,555,000 |  | 2,246,000 |  |
(Recovery) provision |  | 716,000 |  |  |
Reduction due to loan removals |  | (407,000) |  |  |
Balance at end of period |  | 2,555,000 |  |  |
Loans collectively evaluated for impairment |  | 2,555,000 |  |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  | 163,359,000 |  |  |
Total loans |  | 163,359,000 |  |  |
Acquired credit impaired loans | Construction and land development |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period | 569,000 |  | 717,000 |  |
(Recovery) provision |  | (148,000) |  |  |
Balance at end of period |  | 569,000 |  |  |
Loans collectively evaluated for impairment |  | 569,000 |  |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  | 25,032,000 |  |  |
Total loans |  | 25,032,000 |  |  |
Acquired credit impaired loans | Commercial and industrial |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period | 24,000 |  | 79,000 |  |
(Recovery) provision |  | 260,000 |  |  |
Reduction due to loan removals |  | (315,000) |  |  |
Balance at end of period |  | 24,000 |  |  |
Loans collectively evaluated for impairment |  | 24,000 |  |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  | 7,029,000 |  |  |
Total loans |  | 7,029,000 |  |  |
Acquired credit impaired loans | Consumer loans |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Balance at beginning of period | $ 539,000 |  | $ 761,000 |  |
(Recovery) provision |  | (222,000) |  |  |
Balance at end of period |  | 539,000 |  |  |
Loans collectively evaluated for impairment |  | 539,000 |  |  |
Loans |  |  |  |  |
Loans collectively evaluated for impairment |  | 35,488,000 |  |  |
Total loans |  | $ 35,488,000 |  |  |

X
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