LOANS, Allowance Roll Forward (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 96,367	$ 110,955
Charge-offs	(5,018)	(6,382)
Recoveries	652	1,091
Provision for loan losses	1,251	1,500
Ending Balance	93,252	107,164
Ending balance of allowance: individually evaluated for impairment	7,253	6,984
Ending balance of allowance: collectively evaluated for impairment	85,999	100,180
Ending balance of loans: individually evaluated for impairment	48,875	58,959
Ending balance of loans: collectively evaluated for impairment	5,323,681	5,175,880
Loan Balances	5,372,556	5,234,839	5,333,268
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	41,288	46,151
Charge-offs	(1,335)	(2,314)
Recoveries	185	445
Provision for loan losses	559	3,117
Ending Balance	40,697	47,399
Ending balance of allowance: individually evaluated for impairment	2,981	4,144
Ending balance of allowance: collectively evaluated for impairment	37,716	43,255
Ending balance of loans: individually evaluated for impairment	13,822	24,830
Ending balance of loans: collectively evaluated for impairment	2,490,772	2,504,549
Loan Balances	2,504,594	2,529,379
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	22,653	29,295
Charge-offs	(527)	(759)
Recoveries	74	159
Provision for loan losses	(2,003)	(2,150)
Ending Balance	20,197	26,545
Ending balance of allowance: individually evaluated for impairment	2,284	1,654
Ending balance of allowance: collectively evaluated for impairment	17,913	24,891
Ending balance of loans: individually evaluated for impairment	17,266	18,190
Ending balance of loans: collectively evaluated for impairment	1,187,591	1,025,653
Loan Balances	1,204,857	1,043,843
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	21,478	23,101
Charge-offs	(3,156)	(3,309)
Recoveries	393	487
Provision for loan losses	3,149	2,039
Ending Balance	21,864	22,318
Ending balance of allowance: individually evaluated for impairment	1,988	1,186
Ending balance of allowance: collectively evaluated for impairment	19,876	21,132
Ending balance of loans: individually evaluated for impairment	17,787	15,939
Ending balance of loans: collectively evaluated for impairment	1,645,318	1,645,678
Loan Balances	1,663,105	1,661,617
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	10,948	12,408
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	(454)	(1,506)
Ending Balance	10,494	10,902
Ending balance of allowance: individually evaluated for impairment	0	0
Ending balance of allowance: collectively evaluated for impairment	10,494	10,902
Ending balance of loans: individually evaluated for impairment	0	0
Ending balance of loans: collectively evaluated for impairment	0	0
Loan Balances	$ 0	$ 0