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LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Schedule of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 15, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | $ 133,296 | $ 130,281 | $ 135,311 | $ 130,924 | $ 130,924
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 2,576 |  | 2,576 |
Charge-offs |  | (22,724) | (18,579) | (45,551) | (39,693) | (95,066)
Recoveries |  | 4,013 | 3,015 | 8,872 | 5,478 |
Provision (benefit) for credit losses on loans and leases |  | 17,851 | 22,363 | 33,804 | 40,371 |
Ending balance |  | 132,436 | 139,656 | 132,436 | 139,656 | 135,311
Allowance for credit losses on FDIC PCD loans, excluding charge-offs | $ 8,700 |  |  |  |  |
Commercial and industrial, including specialized lending |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 23,003 | 20,050 | 23,503 | 17,582 | 17,582
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 2,576 |  | 2,576 |
Charge-offs |  | (7,348) | (432) | (12,744) | (592) |
Recoveries |  | 1,683 | 174 | 3,407 | 405 |
Provision (benefit) for credit losses on loans and leases |  | 6,383 | 6,724 | 9,555 | 9,121 |
Ending balance |  | 23,721 | 29,092 | 23,721 | 29,092 | 23,503
Commercial and industrial, including specialized lending | Commercial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Charge-offs |  | (7,348) |  | (12,744) |  | (16,915)
Multifamily |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 18,307 | 15,084 | 16,343 | 14,541 | 14,541
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 0 |  | 0 |
Charge-offs |  | (1,433) | (1,448) | (1,906) | (1,448) |
Recoveries |  | 0 | 0 | 0 | 0 |
Provision (benefit) for credit losses on loans and leases |  | 3,778 | 1,764 | 6,215 | 2,307 |
Ending balance |  | 20,652 | 15,400 | 20,652 | 15,400 | 16,343
Multifamily | Commercial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Charge-offs |  | (1,433) |  | (1,906) |  | (3,574)
Commercial real estate owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 10,201 | 8,472 | 9,882 | 6,454 | 6,454
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 0 |  | 0 |
Charge-offs |  | 0 | 0 | (22) | 0 |
Recoveries |  | 0 | 34 | 0 | 34 |
Provision (benefit) for credit losses on loans and leases |  | (1,770) | 1,709 | (1,429) | 3,727 |
Ending balance |  | 8,431 | 10,215 | 8,431 | 10,215 | 9,882
Commercial real estate owner occupied | Commercial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Charge-offs |  | 0 |  | (22) |  | (39)
Commercial real estate non-owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 18,320 | 11,032 | 16,859 | 11,219 | 11,219
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 0 |  | 0 |
Charge-offs |  | 0 | (288) | 0 | (4,527) |
Recoveries |  | 0 | 22 | 0 | 27 |
Provision (benefit) for credit losses on loans and leases |  | (354) | 2,729 | 1,107 | 6,776 |
Ending balance |  | 17,966 | 13,495 | 17,966 | 13,495 | 16,859
Commercial real estate non-owner occupied | Commercial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Charge-offs |  | 0 |  | 0 |  | (4,527)
Construction |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 1,866 | 2,336 | 1,482 | 1,913 | 1,913
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 0 |  | 0 |
Charge-offs |  | 0 | 0 | 0 | 0 |
Recoveries |  | 7 | 0 | 7 | 116 |
Provision (benefit) for credit losses on loans and leases |  | (17) | 303 | 367 | 610 |
Ending balance |  | 1,856 | 2,639 | 1,856 | 2,639 | 1,482
Construction | Commercial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Charge-offs |  | 0 |  | 0 |  | 0
Residential real estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 6,707 | 6,853 | 6,586 | 6,094 | 6,094
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 0 |  | 0 |
Charge-offs |  | 0 | (27) | (19) | (27) |
Recoveries |  | 20 | 3 | 21 | 5 |
Provision (benefit) for credit losses on loans and leases |  | (843) | 17 | (704) | 774 |
Ending balance |  | 5,884 | 6,846 | 5,884 | 6,846 | 6,586
Manufactured housing |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 4,160 | 4,339 | 4,239 | 4,430 | 4,430
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 0 |  | 0 |
Charge-offs |  | 0 | 0 | 0 | 0 |
Recoveries |  | 0 | 0 | 0 | 0 |
Provision (benefit) for credit losses on loans and leases |  | (66) | (1) | (145) | (92) |
Ending balance |  | 4,094 | 4,338 | 4,094 | 4,338 | 4,239
Installment |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 50,732 | 62,115 | 56,417 | 68,691 | 68,691
Allowance for credit losses on FDIC PCD loans, net of charge-offs |  |  | 0 |  | 0 |
Charge-offs |  | (13,943) | (16,384) | (30,860) | (33,099) |
Recoveries |  | 2,303 | 2,782 | 5,437 | 4,891 |
Provision (benefit) for credit losses on loans and leases |  | 10,740 | 9,118 | 18,838 | 17,148 |
Ending balance |  | $ 49,832 | $ 57,631 | $ 49,832 | $ 57,631 | $ 56,417
Special Lending | Commercial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Charge-off of certain PCD loans | $ 6,200 |  |  |  |  |

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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