ASSETS ACQUIRED IN FDIC-ASSISTED ACQUISITIONS (Details 4) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Business Combinations [Abstract]
Beginning balance	$ 6,301	$ 31,351	$ 31,351
Payments received from FDIC	(3,299)	(6,390)	(19,273)
Amortization, net	(1,545)	(3,666)	(8,878)
Change in clawback liability	(91)	(569)	(2,008)
Charge-offs on covered loans	(673)	1,602	416
Write downs of covered other real estate	581	804	4,752
Reimbursable expenses on covered assets	244	651	2,582
Other activity, net	(321)	(471)	(2,641)
Ending balance	$ 1,197	$ 23,312	$ 6,301