OTHER REAL ESTATE OWNED (OREO) (Details) (USD $)	3 Months Ended			9 Months Ended				3 Months Ended					3 Months Ended											3 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Commercial real estate	Dec. 31, 2011 Commercial real estate	Sep. 30, 2012 Construction and land development item	Dec. 31, 2011 Construction and land development	Sep. 30, 2012 Multi-family	Sep. 30, 2012 Single family residence	Dec. 31, 2011 Single family residence	Sep. 30, 2012 Land	Sep. 30, 2012 Non-Covered OREO	Jun. 30, 2012 Non-Covered OREO	Mar. 31, 2012 Non-Covered OREO	Sep. 30, 2012 Non-Covered OREO APB	Sep. 30, 2012 Non-Covered OREO Commercial real estate	Dec. 31, 2011 Non-Covered OREO Commercial real estate	Sep. 30, 2012 Non-Covered OREO Construction and land development	Dec. 31, 2011 Non-Covered OREO Construction and land development	Sep. 30, 2012 Non-Covered OREO Single family residence	Dec. 31, 2011 Non-Covered OREO Single family residence	Sep. 30, 2012 Covered OREO	Jun. 30, 2012 Covered OREO	Mar. 31, 2012 Covered OREO	Sep. 30, 2012 Covered OREO Commercial real estate	Dec. 31, 2011 Covered OREO Commercial real estate	Sep. 30, 2012 Covered OREO Construction and land development	Dec. 31, 2011 Covered OREO Construction and land development	Sep. 30, 2012 Covered OREO Multi-family	Sep. 30, 2012 Covered OREO Single family residence	Dec. 31, 2011 Covered OREO Single family residence
Rollforward of OREO, net of the valuation allowance
Balance, at the beginning of the period	$ 72,832,000	$ 76,094,000	$ 81,918,000	$ 81,918,000		$ 20,184,000	$ 38,056,000		$ 40,249,000	$ 939,000	$ 1,866,000	$ 3,613,000		$ 41,742,000	$ 46,206,000	$ 48,412,000		$ 1,684,000	$ 23,003,000	$ 33,911,000	$ 24,788,000	$ 1,738,000	$ 621,000	$ 31,090,000	$ 29,888,000	$ 33,506,000	$ 18,500,000	$ 15,053,000	$ 6,807,000	$ 15,461,000	$ 939,000	$ 128,000	$ 2,992,000
Other real estate owned																	1,561,000
Reductions related to sales	(15,605,000)	(11,189,000)	(12,545,000)											(5,280,000)	(5,138,000)	(3,915,000)								(10,325,000)	(6,051,000)	(8,630,000)
Foreclosures	12,523,000	10,641,000	9,080,000											1,700,000	684,000	1,839,000								10,823,000	9,957,000	7,241,000
Payments to third parties	176,000	91,000	622,000											176,000	91,000	622,000
Provision for losses	(7,780,000)	(2,805,000)	(2,981,000)	13,566,000	15,011,000									(2,566,000)	(101,000)	(752,000)								(5,214,000)	(2,704,000)	(2,229,000)
Balance, at the end of the period	63,707,000	72,832,000	76,094,000	63,707,000		20,184,000	38,056,000	40,718,000	40,249,000	939,000	1,866,000	3,613,000		37,333,000	41,742,000	46,206,000		1,684,000	23,003,000	33,911,000	24,788,000	1,738,000	621,000	26,374,000	31,090,000	29,888,000	18,500,000	15,053,000	6,807,000	15,461,000	939,000	128,000	2,992,000
Number of reclassified OREO properties								1
Reclassification of property from commercial real estate to land													$ 8,300,000