GOODWILL AND OTHER INTANGIBLE ASSETS (Identifiable Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 79,090		$ 79,090		$ 76,218
Accumulated Amortization	54,159		54,159		50,827
Total	1,126	686	3,332	2,151
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,801		27,801		27,801
Accumulated Amortization	22,653		22,653		22,256
Total	130	141	397	441
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	49,639		49,639		46,967
Accumulated Amortization	30,951		30,951		28,329
Total	883	507	2,622	1,597
Non-Solicitation Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,650		1,650		1,450
Accumulated Amortization	555		555		242
Total	113	38	313	113
Trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 688		$ 688		$ 688