Quarterly report pursuant to Section 13 or 15(d)

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

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period $ 623,064 $ 599,542 $ 597,843 $ 605,196
Loan charge-offs (59,268) (60,875) (162,505) (162,920)
Recoveries of loans previously charged-off 19,203 44,712 97,133 96,950
Provision for loan and lease losses 53,523 13,624 103,947 60,069
Allowance for loans sold or transferred to loans held for sale (19,624) (5,065) (19,520) (7,357)
ALLL balance, end of period 616,898 591,938 616,898 591,938
AULC Balance, beginning of period 73,748 55,371 72,081 60,806
Provision for (reduction in allowance) unfunded loan commitments and letters of credit 10,282 8,852 11,949 3,417
Fair value of acquired AULC 4,403 0 4,403 0
AULC Balance, end of period 88,433 64,223 88,433 64,223
ACL balance, end of period 705,331 656,161 705,331 656,161
Commercial        
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period 424,507 377,101 398,753 389,834
Loan charge-offs (24,839) (29,992) (70,721) (77,118)
Recoveries of loans previously charged-off 8,312 33,955 62,127 63,754
Provision for loan and lease losses 36,689 13,232 54,510 17,826
Allowance for loans sold or transferred to loans held for sale (12,874) 0 (12,874) 0
ALLL balance, end of period 431,795 394,296 431,795 394,296
AULC Balance, beginning of period 63,717 47,627 63,448 55,029
Provision for (reduction in allowance) unfunded loan commitments and letters of credit 9,739 8,759 10,008 1,357
Fair value of acquired AULC 4,403 0 4,403 0
AULC Balance, end of period 77,859 56,386 77,859 56,386
ACL balance, end of period 509,654 450,682 509,654 450,682
Consumer        
Allowance For Credit Losses Roll Forward [Abstract]        
ALLL balance, beginning of period 198,557 222,441 199,090 215,362
Loan charge-offs (34,429) (30,883) (91,784) (85,802)
Recoveries of loans previously charged-off 10,891 10,757 35,006 33,196
Provision for loan and lease losses 16,834 392 49,437 42,243
Allowance for loans sold or transferred to loans held for sale (6,750) (5,065) (6,646) (7,357)
ALLL balance, end of period 185,103 197,642 185,103 197,642
AULC Balance, beginning of period 10,031 7,744 8,633 5,777
Provision for (reduction in allowance) unfunded loan commitments and letters of credit 543 93 1,941 2,060
Fair value of acquired AULC 0 0 0 0
AULC Balance, end of period 10,574 7,837 10,574 7,837
ACL balance, end of period $ 195,677 $ 205,479 $ 195,677 $ 205,479