COMMITMENTS AND CONTINGENCIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Future annual minimum rental payments due under non-cancellable operating leases [Abstract
2013	$ 2,264,000
2014	2,125,000
2015	1,956,000
2016	1,701,000
2017	1,566,000
Thereafter	11,611,000
Total future annual minimum rental payments	21,223,000
Rent expense under operating leases	2,500,000	2,000,000	1,700,000
Line of Credit Facility [Line Items]
FHLB advances	27,128,000
FHLB of Dallas line of credit [Member]
Line of Credit Facility [Line Items]
Borrowing lines capacity	206,100,000
Borrowings line outstanding	0
Correspondent banks line of credit [Member]
Line of Credit Facility [Line Items]
Borrowing lines capacity	48,500,000
Borrowings line outstanding	0
Federal Reserve of Atlanta line of credit [Member]
Line of Credit Facility [Line Items]
Borrowing lines capacity	158,100,000
Borrowings line outstanding	0
FNBB [Member]
Line of Credit Facility [Line Items]
Notes payables with FNBB from PSB	$ 2,000,000