Quarterly report pursuant to Section 13 or 15(d)

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses (Details)

v3.4.0.3
LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period $ 597,843 $ 605,196    
Loan charge-offs (59,692) (55,075)    
Recoveries of loans previously charged-off 51,140 30,643    
Provision for loan and lease losses (24,338) (26,655)    
Allowance for loans sold or transferred to loans held for sale (90) (2,293)    
ALLL balance, end of period 613,719 605,126    
Provision for unfunded loan commitments and letters of credit (3,244) (6,064)    
AULC Balance, end of period 75,325 54,742 $ 72,081 $ 60,806
ACL balance, end of period 689,044 659,868    
Commercial and Industrial        
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period 298,746 286,995    
Loan charge-offs (16,823) (24,612)    
Recoveries of loans previously charged-off 10,309 13,209    
Provision for loan and lease losses (28,135) (8,981)    
Allowance for loans sold or transferred to loans held for sale 0 0    
ALLL balance, end of period 320,367 284,573    
Provision for unfunded loan commitments and letters of credit (2,499) (6,673)    
AULC Balance, end of period 58,385 42,315 55,886 48,988
ACL balance, end of period 378,752 326,888    
Commercial Real Estate        
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period 100,007 102,839    
Loan charge-offs (12,126) (2,013)    
Recoveries of loans previously charged-off 29,602 6,025    
Provision for loan and lease losses (15,409) (6,099)    
Allowance for loans sold or transferred to loans held for sale 0 0    
ALLL balance, end of period 102,074 100,752    
Provision for unfunded loan commitments and letters of credit (75) (510)    
AULC Balance, end of period 7,487 5,531 7,562 6,041
ACL balance, end of period 109,561 106,283    
Automobile        
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period 49,504 33,466    
Loan charge-offs (11,486) (8,103)    
Recoveries of loans previously charged-off 4,716 3,855    
Provision for loan and lease losses (5,298) (10,200)    
Allowance for loans sold or transferred to loans held for sale 0 (2,293)    
ALLL balance, end of period 48,032 37,125    
Provision for unfunded loan commitments and letters of credit 0 0    
AULC Balance, end of period 0 0 0 0
ACL balance, end of period 48,032 37,125    
Home Equity        
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period 83,671 96,413    
Loan charge-offs (7,710) (8,586)    
Recoveries of loans previously charged-off 4,029 3,961    
Provision for loan and lease losses (1,888) (18,492)    
Allowance for loans sold or transferred to loans held for sale 0 0    
ALLL balance, end of period 78,102 110,280    
Provision for unfunded loan commitments and letters of credit (42) (715)    
AULC Balance, end of period 2,110 2,639 2,068 1,924
ACL balance, end of period 80,212 112,919    
Residential Mortgage        
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period 41,646 47,211    
Loan charge-offs (2,760) (4,863)    
Recoveries of loans previously charged-off 1,113 2,047    
Provision for loan and lease losses (753) (10,985)    
Allowance for loans sold or transferred to loans held for sale (90) 0    
ALLL balance, end of period 40,842 55,380    
Provision for unfunded loan commitments and letters of credit (2) (1)    
AULC Balance, end of period 20 9 18 8
ACL balance, end of period 40,862 55,389    
Other Consumer        
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period 24,269 38,272    
Loan charge-offs (8,787) (6,898)    
Recoveries of loans previously charged-off 1,371 1,546    
Provision for loan and lease losses (7,449) (15,904)    
Allowance for loans sold or transferred to loans held for sale 0 0    
ALLL balance, end of period 24,302 17,016    
Provision for unfunded loan commitments and letters of credit (776) (403)    
AULC Balance, end of period 7,323 4,248 $ 6,547 $ 3,845
ACL balance, end of period $ 31,625 $ 21,264