GOODWILL AND OTHER INTANGIBLE ASSETS (Identifiable Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 71,233		$ 79,090
Accumulated Amortization	52,257		59,233
Total	880	$ 1,032
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,801		27,801
Accumulated Amortization	23,386		23,269
Total	117	93
Customer Relationship Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	42,232		49,639
Accumulated Amortization	28,154		34,922
Total	638	826
Non-Solicitation Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,200		1,650
Accumulated Amortization	717		1,042
Total	125	$ 113
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 688		$ 688