COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Lending commitments:
Commitments to extend credit	$ 779,644	$ 658,925
Commercial letters of credit	19,046	12,421
Other commitments:
Standby letters of credit issued by the FHLB on the Bank's behalf	10,000	10,000
Capital commitment to private investment funds	3,085	2,280
Reserve for unfunded commitments	$ 1,269	$ 1,465