COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Commitments to extend credit	$ 500,631	$ 293,517	$ 284,202
Unused lines of credit	53,465	49,567	48,606
Financial standby letters of credit	11,929	9,683	9,168
Mortgage interest rate lock commitments	$ 79,635	$ 38,868	$ 53,790