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ALLOWANCE FOR CREDIT LOSSES ON LOANS AND FINANCE LOSSES - Activity in ACL on loans and finance leases (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]    
Beginning balance $ 269,030 $ 385,887
Provision for credit losses - (benefit) expense (16,989) (14,443)
Charge-offs (12,715) (16,234)
Recoveries 6,121 3,726
Ending balance 245,447 358,936
Residential Portfolio Segment [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Beginning balance 74,837 120,311
Provision for credit losses - (benefit) expense (4,871) (4,175)
Charge-offs (2,528) (2,825)
Recoveries 1,382 733
Ending balance 68,820 114,044
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Beginning balance 34,284 37,944
Provision for credit losses - (benefit) expense 1,755 (5,312)
Charge-offs (290) (809)
Recoveries 1,035 264
Ending balance 36,784 32,087
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Beginning balance 52,771 109,342
Provision for credit losses - (benefit) expense (22,640) (8,820)
Charge-offs (37) (794)
Recoveries 44 54
Ending balance 30,138 99,782
Commercial Portfolio Segment [Member] | Construction Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Beginning balance 4,048 5,380
Provision for credit losses - (benefit) expense (2,214) (456)
Charge-offs (44) (45)
Recoveries 52 36
Ending balance 1,842 4,915
Consumer Portfolio Segment [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Beginning balance 103,090 112,910
Provision for credit losses - (benefit) expense 10,981 4,320
Charge-offs (9,816) (11,761)
Recoveries 3,608 2,639
Ending balance $ 107,863 $ 108,108