LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for loan losses
Balance at the beginning of the period	$ 39,889	$ 42,605	$ 46,648
Provision charged to expense	9,850	17,800	35,250
Losses charged off	(22,332)	(24,894)	(42,446)
Recoveries	4,820	4,378	3,153
Balance at the end of the period	32,227	39,889	42,605
Allowance for loan losses
Ending Balance individually evaluated for impairment	3,217	6,669
Ending Balance collectively evaluated for impairment	29,010	33,220
Total ending allowance balance	32,227	39,889	42,605
Loans
Ending Balance individually evaluated for impairment	50,554	61,931
Ending Balance collectively evaluated for impairment	1,502,829	1,472,448
Total ending loan balance excluding accrued interest	1,553,383	1,534,379
Accrued interest	5,206	5,835
Commercial
Allowance for loan losses
Balance at the beginning of the period	5,562	6,386
Provision charged to expense	(265)	215
Losses charged off	(1,946)	(2,211)
Recoveries	543	1,172
Balance at the end of the period	3,894	5,562
Allowance for loan losses
Ending Balance individually evaluated for impairment	150	1,193
Ending Balance collectively evaluated for impairment	3,744	4,369
Total ending allowance balance	3,894	5,562
Loans
Ending Balance individually evaluated for impairment	1,797	5,144
Ending Balance collectively evaluated for impairment	157,937	129,964
Total ending loan balance excluding accrued interest	159,734	135,108
Commercial Real Estate
Allowance for loan losses
Balance at the beginning of the period	30,476	32,653
Provision charged to expense	4,802	13,406
Losses charged off	(13,553)	(16,954)
Recoveries	2,432	1,371
Balance at the end of the period	24,157	30,476
Allowance for loan losses
Ending Balance individually evaluated for impairment	3,067	5,476
Ending Balance collectively evaluated for impairment	21,090	25,000
Total ending allowance balance	24,157	30,476
Loans
Ending Balance individually evaluated for impairment	33,499	41,149
Ending Balance collectively evaluated for impairment	693,331	723,015
Total ending loan balance excluding accrued interest	726,830	764,164
Residential
Allowance for loan losses
Balance at the beginning of the period	2,972	2,281
Provision charged to expense	3,490	3,136
Losses charged off	(3,547)	(3,093)
Recoveries	265	648
Balance at the end of the period	3,180	2,972
Allowance for loan losses
Ending Balance collectively evaluated for impairment	3,180	2,972
Total ending allowance balance	3,180	2,972
Loans
Ending Balance individually evaluated for impairment	14,175	14,522
Ending Balance collectively evaluated for impairment	604,349	563,390
Total ending loan balance excluding accrued interest	618,524	577,912
Consumer
Allowance for loan losses
Balance at the beginning of the period	879	1,285
Provision charged to expense	1,823	1,043
Losses charged off	(3,286)	(2,636)
Recoveries	1,580	1,187
Balance at the end of the period	996	879
Allowance for loan losses
Ending Balance collectively evaluated for impairment	996	879
Total ending allowance balance	996	879
Loans
Ending Balance individually evaluated for impairment	1,083	1,116
Ending Balance collectively evaluated for impairment	47,212	56,079
Total ending loan balance excluding accrued interest	$ 48,295	$ 57,195