LOANS AND ALLOWANCE (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Allowance for loan losses
Balance at the beginning of the period	$ 38,289	$ 41,462	$ 39,889	$ 42,605
Provision charged to expense	2,000	5,000	7,600	14,600
Losses charged off	(6,154)	(5,661)	(15,858)	(18,218)
Recoveries	1,111	632	3,615	2,446
Balance at the end of the period	35,246	41,433	35,246	41,433
Allowance for loan losses
Ending Balance individually evaluated for impairment	6,165		6,165		6,669
Ending Balance collectively evaluated for impairment	29,081		29,081		33,220
Total ending allowance balance	35,246	41,433	35,246	41,433
Loans
Ending Balance individually evaluated for impairment	50,317		50,317		61,931
Ending Balance collectively evaluated for impairment	1,481,208		1,481,208		1,472,448
Total ending loan balance excluding accrued interest	1,531,525		1,531,525		1,534,379
Accrued interest	5,664		5,664		5,835
Commercial
Allowance for loan losses
Balance at the beginning of the period	4,945	5,789	5,562	6,386
Provision charged to expense	223	1,410	(572)	1,151
Losses charged off	(178)	(1,291)	(455)	(1,834)
Recoveries	67	5	522	210
Balance at the end of the period	5,057	5,913	5,057	5,913
Allowance for loan losses
Ending Balance individually evaluated for impairment	1,817		1,817		1,193
Ending Balance collectively evaluated for impairment	3,240		3,240		4,369
Total ending allowance balance	5,057	5,913	5,057	5,913
Loans
Ending Balance individually evaluated for impairment	5,126		5,126		5,144
Ending Balance collectively evaluated for impairment	141,745		141,745		129,964
Total ending loan balance excluding accrued interest	146,871		146,871		135,108
Commercial Real Estate
Allowance for loan losses
Balance at the beginning of the period	29,580	31,851	30,476	32,653
Provision charged to expense	464	2,346	4,555	10,162
Losses charged off	(3,936)	(3,017)	(10,025)	(12,283)
Recoveries	528	295	1,630	943
Balance at the end of the period	26,636	31,475	26,636	31,475
Allowance for loan losses
Ending Balance individually evaluated for impairment	4,348		4,348		5,476
Ending Balance collectively evaluated for impairment	22,288		22,288		25,000
Total ending allowance balance	26,636	31,475	26,636	31,475
Loans
Ending Balance individually evaluated for impairment	30,391		30,391		41,149
Ending Balance collectively evaluated for impairment	701,116		701,116		723,015
Total ending loan balance excluding accrued interest	731,507		731,507		764,164
Residential
Allowance for loan losses
Balance at the beginning of the period	2,975	2,588	2,972	2,281
Provision charged to expense	840	730	2,549	2,383
Losses charged off	(1,078)	(598)	(2,910)	(2,308)
Recoveries	106	56	232	420
Balance at the end of the period	2,843	2,776	2,843	2,776
Allowance for loan losses
Ending Balance collectively evaluated for impairment	2,843		2,843		2,972
Total ending allowance balance	2,843	2,776	2,843	2,776
Loans
Ending Balance individually evaluated for impairment	13,797		13,797		14,522
Ending Balance collectively evaluated for impairment	590,003		590,003		563,390
Total ending loan balance excluding accrued interest	603,800		603,800		577,912
Consumer
Allowance for loan losses
Balance at the beginning of the period	789	1,234	879	1,285
Provision charged to expense	473	514	1,068	904
Losses charged off	(962)	(755)	(2,468)	(1,793)
Recoveries	410	276	1,231	873
Balance at the end of the period	710	1,269	710	1,269
Allowance for loan losses
Ending Balance collectively evaluated for impairment	710		710		879
Total ending allowance balance	710	1,269	710	1,269
Loans
Ending Balance individually evaluated for impairment	1,003		1,003		1,116
Ending Balance collectively evaluated for impairment	48,344		48,344		56,079
Total ending loan balance excluding accrued interest	$ 49,347		$ 49,347		$ 57,195