COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Commitments to extend credit	$ 604,133	$ 548,898	$ 328,191
Unused lines of credit	52,814	52,798	143,962
Financial standby letters of credit	81,599	14,712	10,548
Mortgage interest rate lock commitments	$ 135,250	$ 77,710	$ 91,482