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ALLOWANCE FOR LOAN AND LEASE LOSSES - Changes in Allowance for Loan and Lease Losses (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning balance $ 205,603 $ 240,710    
Charge-offs (134,770) (136,928)    
Recoveries 16,756 15,088    
Provision (release) 144,254 86,733    
Ending balance 231,843 205,603    
Related Allowance 51,410 64,421 $ 52,581 $ 55,205
Ending balance: purchased credit-impaired loans 11,251 6,857    
Ending balance: general allowance 169,182 134,325    
Ending balance 8,850,476 8,886,873    
Ending balance: impaired loans 790,308 887,905 $ 806,509 $ 945,407
Ending balance: purchased credit-impaired loans 158,174 [1] 165,818 [2]    
Ending balance: loans with general allowance 7,901,994 7,833,150    
Purchased Credit Impaired [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Ending balance: purchased credit-impaired loans [3] 11,251 6,857    
Residential Mortgage [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning balance 33,980 39,570    
Charge-offs (28,186) (33,621)    
Recoveries 2,437 2,941    
Provision (release) 50,744 25,090    
Ending balance 58,975 33,980    
Related Allowance 22,086 8,633    
Ending balance: general allowance 26,016 18,715    
Ending balance 3,290,957 3,296,031    
Ending balance: impaired loans 433,434 442,267    
Ending balance: purchased credit-impaired loans 153,991 162,676    
Ending balance: loans with general allowance 2,703,532 2,691,088    
Residential Mortgage [Member] | Purchased Credit Impaired [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Ending balance: purchased credit-impaired loans [3] 10,873 6,632    
Commercial Mortgage Loans [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning balance 57,261 68,211    
Charge-offs (39,092) (20,454)    
Recoveries 270 816    
Provision (release) 30,054 8,688    
Ending balance 48,493 57,261    
Related Allowance 9,783 26,172    
Ending balance: general allowance 38,332 30,864    
Ending balance 1,614,972 1,568,808    
Ending balance: impaired loans 152,914 194,391    
Ending balance: purchased credit-impaired loans 4,183 3,142    
Ending balance: loans with general allowance 1,457,875 1,371,275    
Commercial Mortgage Loans [Member] | Purchased Credit Impaired [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Ending balance: purchased credit-impaired loans [3] 378 225    
Commercial And Industrial Loans [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning balance 61,953 68,768    
Charge-offs (19,855) (26,579)    
Recoveries 5,755 2,689    
Provision (release) 1,018 17,075    
Ending balance 48,871 61,953    
Related Allowance 12,359 22,638    
Ending balance: general allowance 36,512 39,315    
Ending balance 2,083,253 2,180,455    
Ending balance: impaired loans 118,300 153,543    
Ending balance: purchased credit-impaired loans 0 0    
Ending balance: loans with general allowance 1,964,953 2,026,912    
Commercial And Industrial Loans [Member] | Purchased Credit Impaired [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Ending balance: purchased credit-impaired loans [3] 0 0    
Construction Loans [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning balance 2,562 3,519    
Charge-offs (3,607) (1,770)    
Recoveries 732 316    
Provision (release) 4,835 497    
Ending balance 4,522 2,562    
Related Allowance 2,017 1,405    
Ending balance: general allowance 2,505 1,157    
Ending balance 111,397 124,951    
Ending balance: impaired loans 47,266 53,291    
Ending balance: purchased credit-impaired loans 0 0    
Ending balance: loans with general allowance 64,131 71,660    
Construction Loans [Member] | Purchased Credit Impaired [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Ending balance: purchased credit-impaired loans [3] 0 0    
Consumer Loan [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning balance 49,847 60,642    
Charge-offs (44,030) (54,504)    
Recoveries 7,562 8,326    
Provision (release) 57,603 35,383    
Ending balance 70,982 49,847    
Related Allowance 5,165 5,573    
Ending balance: general allowance 65,817 44,274    
Ending balance 1,749,897 1,716,628    
Ending balance: impaired loans 38,394 44,413    
Ending balance: purchased credit-impaired loans 0 0    
Ending balance: loans with general allowance 1,711,503 1,672,215    
Consumer Loan [Member] | Purchased Credit Impaired [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Ending balance: purchased credit-impaired loans [3] $ 0 $ 0    
[1]
According to the Corporation's delinquency policy and consistent with the instructions for the preparation of the Consolidated Financial Statements for Bank Holding Companies (FR Y-9C) required by the Federal Reserve Board, residential mortgage and commercial mortgage loans are considered past due when the borrower is in arrears two or more monthly payments. PCI residential mortgage loans and commercial mortgage loans past due 30-59 days as of December 31, 2017 amounted to $28.1 million and $0.2 million, respectively.
[2]
According to the Corporation's delinquency policy and consistent with the instructions for the preparation of the Consolidated Financial Statements for Bank Holding Companies (FR Y-9C) required by the Federal Reserve Board, residential mortgage and commercial mortgage loans are considered past due when the borrower is in arrears two or more monthly payments. PCI residential mortgage loans and commercial mortgage loans past due 30-59 days as of December 31, 2016 amounted to $22.3 million and $0.1 million, respectively.
[3]
Refer to Note 9 - Loans Held for Investment - PCI Loans for additional information about changes in the allowance for loan losses related to PCI loans.