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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses and Recorded Investment Excluding Accrued Interest in Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | $ 81,030 |  |
Provision for (reversal of) credit losses | 6,854 | $ 29,719 | $ 35,829
Balance at end of year | 92,584 | 81,030 |
Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 84,213 | 61,713 | 66,814
Initial allowance for credit losses purchased in acquisition | 13,650 | 0 | 0
Charge-offs | (9,886) | (15,417) | (41,766)
Recoveries | 3,358 | 1,815 | 836
Net (charge-offs) recoveries | (6,528) | (13,602) | (40,930)
Provision for (reversal of) credit losses | 6,854 | 29,719 | 35,829
Balance at end of year | 98,189 | 84,213 | 61,713
Commercial real estate | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 0 | 6,383 | 0
Balance at end of year |  | 0 | 6,383
Allowance for Loan Losses |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 81,030 | 57,649 |
Initial allowance for credit losses purchased in acquisition | 13,650 |  |
Charge-offs | (9,886) | (15,417) |
Recoveries | 3,358 | 1,815 |
Net (charge-offs) recoveries | (6,528) | (13,602) |
Provision for (reversal of) credit losses | 4,432 | 29,374 |
Balance at end of year | 92,584 | 81,030 | 57,649
Allowance for Loan Losses | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year |  | 7,609 |
Balance at end of year |  |  | 7,609
Allowance for Loan Losses | Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 81,030 | 57,649 | 62,192
Initial allowance for credit losses purchased in acquisition | 13,650 | 0 | 0
Charge-offs | (9,886) | (15,417) | (41,766)
Recoveries | 3,358 | 1,815 | 836
Net (charge-offs) recoveries | (6,528) | (13,602) | (40,930)
Provision for (reversal of) credit losses | 4,432 | 29,374 | 36,387
Balance at end of year | 92,584 | 81,030 | 57,649
Allowance for Loan Losses | Commercial real estate | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 0 | 7,609 | 0
Balance at end of year |  | 0 | 7,609
Allowance for Loan Losses | Commercial | Commercial and industrial |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 20,608 | 22,353 |
Initial allowance for credit losses purchased in acquisition | 11,933 |  |
Charge-offs | (6,209) | (13,588) |
Recoveries | 3,150 | 604 |
Net (charge-offs) recoveries | (3,059) | (12,984) |
Provision for (reversal of) credit losses | 4,075 | 10,577 |
Balance at end of year | 33,557 | 20,608 | 22,353
Allowance for Loan Losses | Commercial | Commercial and industrial | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year |  | 662 |
Balance at end of year |  |  | 662
Allowance for Loan Losses | Commercial | Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 19,074 | 5,941 |
Initial allowance for credit losses purchased in acquisition | 614 |  |
Charge-offs | (576) | 0 |
Recoveries | 0 | 0 |
Net (charge-offs) recoveries | (576) | 0 |
Provision for (reversal of) credit losses | 2,615 | 8,286 |
Balance at end of year | 21,727 | 19,074 | 5,941
Allowance for Loan Losses | Commercial | Commercial real estate | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year |  | 4,847 |
Balance at end of year |  |  | 4,847
Allowance for Loan Losses | Commercial | Multifamily |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 22,512 | 11,405 |
Initial allowance for credit losses purchased in acquisition | 469 |  |
Charge-offs | 0 | 0 |
Recoveries | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 |
Provision for (reversal of) credit losses | (5,088) | 9,298 |
Balance at end of year | 17,893 | 22,512 | 11,405
Allowance for Loan Losses | Commercial | Multifamily | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year |  | 1,809 |
Balance at end of year |  |  | 1,809
Allowance for Loan Losses | Commercial | SBA |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 3,145 | 3,120 |
Initial allowance for credit losses purchased in acquisition | 575 |  |
Charge-offs | (2,780) | (1,083) |
Recoveries | 132 | 328 |
Net (charge-offs) recoveries | (2,648) | (755) |
Provision for (reversal of) credit losses | 1,945 | 392 |
Balance at end of year | 3,017 | 3,145 | 3,120
Allowance for Loan Losses | Commercial | SBA | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year |  | 388 |
Balance at end of year |  |  | 388
Allowance for Loan Losses | Commercial | Construction |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 5,849 | 3,906 |
Initial allowance for credit losses purchased in acquisition | 28 |  |
Charge-offs | 0 | 0 |
Recoveries | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 |
Provision for (reversal of) credit losses | (255) | 1,840 |
Balance at end of year | 5,622 | 5,849 | 3,906
Allowance for Loan Losses | Commercial | Construction | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year |  | 103 |
Balance at end of year |  |  | 103
Allowance for Loan Losses | Consumer | Single Family Residential Mortgage |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 9,191 | 10,486 |
Initial allowance for credit losses purchased in acquisition | 0 |  |
Charge-offs | (321) | (742) |
Recoveries | 74 | 664 |
Net (charge-offs) recoveries | (247) | (78) |
Provision for (reversal of) credit losses | 664 | (797) |
Balance at end of year | 9,608 | 9,191 | 10,486
Allowance for Loan Losses | Consumer | Single Family Residential Mortgage | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year |  | (420) |
Balance at end of year |  |  | (420)
Allowance for Loan Losses | Consumer | Other Consumer |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 651 | 438 |
Initial allowance for credit losses purchased in acquisition | 31 |  |
Charge-offs | 0 | (4) |
Recoveries | 2 | 219 |
Net (charge-offs) recoveries | 2 | 215 |
Provision for (reversal of) credit losses | 476 | (222) |
Balance at end of year | 1,160 | 651 | 438
Allowance for Loan Losses | Consumer | Other Consumer | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year |  | 220 |
Balance at end of year |  |  | 220
Reserve for Unfunded Loan Commit-ments | Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | 3,183 | 4,064 | 4,622
Initial allowance for credit losses purchased in acquisition | 0 | 0 | 0
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Net (charge-offs) recoveries | 0 | 0 | 0
Provision for (reversal of) credit losses | 2,422 | 345 | (558)
Balance at end of year | 5,605 | 3,183 | 4,064
Reserve for Unfunded Loan Commit-ments | Commercial real estate | Impact of ASC 326 Adoption |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance at beginning of year | $ 0 | (1,226) | 0
Balance at end of year |  | $ 0 | $ (1,226)

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