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Portfolio Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - Non-Covered Loans - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Nov. 12, 2020
Allowance for Loan Losses [Roll Forward] |  |  |  |  |
Balance, beginning of year | $ 42,567 | $ 136,671 | $ 42,567 | $ 42,295 |
CECL adoption | 28,387 |  |  |  |
PCD loans immediately charged off | (1,680) | (13,000) | (63,400) | (6,700) |
Provision (benefit) for loan losses |  | 12,993 | 63,379 | 6,682 |
Initial Allowance on Acquired PCD Loans |  | 7,006 |  |  | $ 3,524
Charge-offs |  | (17,185) | (6,739) | (8,594) |
Recoveries |  | 5,556 | 6,512 | 2,184 |
Balance, end of year | 69,995 | 145,041 | 136,671 | 42,567 |
Financing Receivable, Allowance For Credit Losses, Organic |  |  |  | 42,567 |
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired |  |  |  | 721 |
Commercial and industrial |  |  |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |  |  |
Balance, beginning of year | 27,296 | 58,812 | 27,296 | 29,039 |
CECL adoption | 6,494 |  |  |  |
PCD loans immediately charged off | 0 |  |  |  |
Provision (benefit) for loan losses |  | 14,361 | 28,373 | 4,801 |
Initial Allowance on Acquired PCD Loans |  | 1,077 |  |  | 23
Charge-offs |  | (12,113) | (5,381) | (6,882) |
Recoveries |  | 1,688 | 1,848 | 338 |
Balance, end of year | 33,949 | 63,825 | 58,812 | 27,296 |
Financing Receivable, Allowance For Credit Losses, Organic |  |  |  | 27,296 |
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired |  |  |  | 159 |
Commercial - investor owned |  |  |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |  |  |
Balance, beginning of year | 5,935 | 32,062 | 5,935 | 4,683 |
CECL adoption | 10,726 |  |  |  |
PCD loans immediately charged off | (5) |  |  |  |
Provision (benefit) for loan losses |  | 568 | 11,037 | 1,708 |
Initial Allowance on Acquired PCD Loans |  | 3,651 |  |  | 2,026
Charge-offs |  | (2,487) | (498) | (551) |
Recoveries |  | 2,083 | 2,841 | 95 |
Balance, end of year | 16,656 | 35,877 | 32,062 | 5,935 |
Financing Receivable, Allowance For Credit Losses, Organic |  |  |  | 5,935 |
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired |  |  |  | 0 |
CRE - owner occupied |  |  |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |  |  |
Balance, beginning of year | 4,873 | 17,012 | 4,873 | 4,239 |
CECL adoption | 2,598 |  |  |  |
PCD loans immediately charged off | (57) |  |  |  |
Provision (benefit) for loan losses |  | (550) | 7,845 | 673 |
Initial Allowance on Acquired PCD Loans |  | 1,504 |  |  | 1,427
Charge-offs |  | (602) | (30) | (58) |
Recoveries |  | 196 | 356 | 19 |
Balance, end of year | 7,414 | 17,560 | 17,012 | 4,873 |
Financing Receivable, Allowance For Credit Losses, Organic |  |  |  | 4,873 |
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired |  |  |  | 0 |
Construction and land development |  |  |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |  |  |
Balance, beginning of year | 2,472 | 21,413 | 2,472 | 1,987 |
CECL adoption | 5,183 |  |  |  |
PCD loans immediately charged off | (217) |  |  |  |
Provision (benefit) for loan losses |  | (7,365) | 13,438 | (237) |
Initial Allowance on Acquired PCD Loans |  | 37 |  |  | 45
Charge-offs |  | (3) | (31) | (54) |
Recoveries |  | 454 | 384 | 776 |
Balance, end of year | 7,577 | 14,536 | 21,413 | 2,472 |
Financing Receivable, Allowance For Credit Losses, Organic |  |  |  | 2,472 |
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired |  |  |  | 139 |
Residential real estate |  |  |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |  |  |
Balance, beginning of year | 1,280 | 4,585 | 1,280 | 1,616 |
CECL adoption | 3,470 |  |  |  |
PCD loans immediately charged off | (1,401) |  |  |  |
Provision (benefit) for loan losses |  | 3,900 | 674 | (330) |
Initial Allowance on Acquired PCD Loans |  | 0 |  |  | 3
Charge-offs |  | (1,521) | (408) | (667) |
Recoveries |  | 963 | 967 | 661 |
Balance, end of year | 3,349 | 7,927 | 4,585 | 1,280 |
Financing Receivable, Allowance For Credit Losses, Organic |  |  |  | 1,280 |
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired |  |  |  | 0 |
Other |  |  |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |  |  |
Balance, beginning of year | 711 | 2,787 | 711 | 731 |
CECL adoption | (84) |  |  |  |
PCD loans immediately charged off | 0 |  |  |  |
Provision (benefit) for loan losses |  | 2,079 | 2,012 | 67 |
Initial Allowance on Acquired PCD Loans |  | 737 |  |  | $ 0
Charge-offs |  | (459) | (391) | (382) |
Recoveries |  | 172 | 116 | 295 |
Balance, end of year | $ 1,050 | $ 5,316 | $ 2,787 | 711 |
Financing Receivable, Allowance For Credit Losses, Organic |  |  |  | 711 |
Financing Receivable, Allowance For Credit Losses, Purchased Credit Impaired |  |  |  | $ 423 |

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