GOODWILL AND OTHER INTANGIBLE ASSETS (Identifiable Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 79,090		$ 79,090		$ 79,090
Accumulated Amortization	57,363		57,363		55,270
Total	1,061	$ 1,148	2,093	$ 2,206
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,801		27,801		27,801
Accumulated Amortization	23,028		23,028		22,782
Total	153	130	246	267
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	49,639		49,639		49,639
Accumulated Amortization	33,443		33,443		31,821
Total	796	905	1,622	1,739
Non-Solicitation Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,650		1,650		1,650
Accumulated Amortization	892		892		667
Total	112	$ 113	225	$ 200
Trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 688		$ 688		$ 688