FAIR VALUE ACCOUNTING AND MEASUREMENT (Unobservable Inputs Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Junior Subordinated Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 84,326	$ 74,135	$ 78,001	$ 73,928
Liabilities (gains) losses	368	3,178	734	3,385
Purchases, issuances and settlements, including the Siuslaw acquisition	0		5,959
Sales, maturities and paydowns, net of discount amortization	0	0	0	0
Ending balance	84,694	77,313	84,694	77,313
TPS and TRUP CDOs [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	17,456	35,062	19,119	35,140
Assets gains (losses), including OTTI	1,348	3,464	2,071	3,420
Purchases, issuances and settlements, including the Siuslaw acquisition	0		0
Sales, maturities and paydowns, net of discount amortization	(6,233)	3	(8,619)	(31)
Ending balance	$ 12,571	$ 38,529	$ 12,571	$ 38,529