LOANS AND ALLOWANCE (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Allowance for loan losses
Balance at the beginning of the period	$ 38,541	$ 43,255	$ 39,889	$ 42,605
Provision charged to expense	2,500	4,000	5,600	9,600
Losses charged off	(3,783)	(6,564)	(9,704)	(12,557)
Recoveries	1,031	771	2,504	1,814
Balance at the end of the period	38,289	41,462	38,289	41,462
Allowance for loan losses
Ending Balance individually evaluated for impairment	6,974		6,974		6,669
Ending Balance collectively evaluated for impairment	31,315		31,315		33,220
Total ending allowance balance	38,289	41,462	38,289	41,462
Loans
Ending Balance individually evaluated for impairment	54,980		54,980		61,931
Ending Balance collectively evaluated for impairment	1,491,530		1,491,530		1,472,448
Total ending loan balance excluding accrued interest	1,546,510		1,546,510		1,534,379
Accrued interest	5,401		5,401		5,835
Commercial
Allowance for loan losses
Balance at the beginning of the period	5,331	5,949	5,562	6,386
Provision charged to expense	(577)	(53)	(795)	(259)
Losses charged off	(97)	(284)	(277)	(543)
Recoveries	288	177	455	205
Balance at the end of the period	4,945	5,789	4,945	5,789
Allowance for loan losses
Ending Balance individually evaluated for impairment	1,000		1,000		1,193
Ending Balance collectively evaluated for impairment	3,945		3,945		4,369
Total ending allowance balance	4,945	5,789	4,945	5,789
Loans
Ending Balance individually evaluated for impairment	5,363		5,363		5,144
Ending Balance collectively evaluated for impairment	139,106		139,106		129,964
Total ending loan balance excluding accrued interest	144,469		144,469		135,108
Commercial Real Estate
Allowance for loan losses
Balance at the beginning of the period	30,240	33,229	30,476	32,653
Provision charged to expense	1,198	3,450	4,091	7,816
Losses charged off	(2,181)	(5,004)	(6,089)	(9,266)
Recoveries	323	176	1,102	648
Balance at the end of the period	29,580	31,851	29,580	31,851
Allowance for loan losses
Ending Balance individually evaluated for impairment	5,974		5,974		5,476
Ending Balance collectively evaluated for impairment	23,606		23,606		25,000
Total ending allowance balance	29,580	31,851	29,580	31,851
Loans
Ending Balance individually evaluated for impairment	33,247		33,247		41,149
Ending Balance collectively evaluated for impairment	716,170		716,170		723,015
Total ending loan balance excluding accrued interest	749,417		749,417		764,164
Residential
Allowance for loan losses
Balance at the beginning of the period	2,012	2,607	2,972	2,281
Provision charged to expense	1,527	606	1,709	1,653
Losses charged off	(618)	(788)	(1,832)	(1,710)
Recoveries	54	163	126	364
Balance at the end of the period	2,975	2,588	2,975	2,588
Allowance for loan losses
Ending Balance collectively evaluated for impairment	2,975		2,975		2,972
Total ending allowance balance	2,975	2,588	2,975	2,588
Loans
Ending Balance individually evaluated for impairment	15,275		15,275		14,522
Ending Balance collectively evaluated for impairment	584,024		584,024		563,390
Total ending loan balance excluding accrued interest	599,299		599,299		577,912
Consumer
Allowance for loan losses
Balance at the beginning of the period	958	1,470	879	1,285
Provision charged to expense	352	(3)	595	390
Losses charged off	(887)	(488)	(1,506)	(1,038)
Recoveries	366	255	821	597
Balance at the end of the period	789	1,234	789	1,234
Allowance for loan losses
Ending Balance collectively evaluated for impairment	789		789		879
Total ending allowance balance	789	1,234	789	1,234
Loans
Ending Balance individually evaluated for impairment	1,095		1,095		1,116
Ending Balance collectively evaluated for impairment	52,230		52,230		56,079
Total ending loan balance excluding accrued interest	$ 53,325		$ 53,325		$ 57,195