LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Purchases, Sales, and Transfers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 23,639	$ 36,728	$ 88,913	$ 137,891
Sales	(30,024)	0	(40,780)	(242,087)
Transfers from (to) Held-For-Sale	(100,191)	860	(154,486)	434,094
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	0
Sales	0	0	0	0
Transfers from (to) Held-For-Sale	(169)	(952)	(169)	(4,992)
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	0
Sales	0	0	0	0
Transfers from (to) Held-For-Sale	(2,228)	(370)	(2,228)	(39,997)
Commercial | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	0
Sales	0	0	0	(242,087)
Transfers from (to) Held-For-Sale	(66,806)	0	(66,806)	0
Commercial | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	23,639	36,728	88,913	88,404
Sales	(8,985)	0	(19,741)	0
Transfers from (to) Held-For-Sale	0	0	0	0
Consumer | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	49,488
Sales	(21,039)	0	(21,039)	0
Transfers from (to) Held-For-Sale	$ (30,988)	$ 2,182	$ (85,283)	$ 479,083