COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Commitments to extend credit	$ 924,374	$ 548,898	$ 500,631
Unused lines of credit	62,544	52,798	53,465
Financial standby letters of credit	14,002	14,712	11,929
Mortgage interest rate lock commitments	$ 134,619	$ 77,710	$ 79,635