LOANS AND ALLOWANCE FOR CREDIT LOSSES (Details 8) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010
Allowance for loan losses	$ 33,132		$ 35,212	$ 38,422
Reserve for unfunded commitments	768		771	809
Total allowance for credit losses	$ 33,900	$ 34,634	$ 35,983	$ 39,231	$ 40,429	$ 41,067