ASSETS ACQUIRED IN FDIC-ASSISTED ACQUISITIONS (Details 2) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Covered Loans [Line Items]
Balance, beginning of year	$ 9,063	$ 15,578	$ 15,578
Accretion	1,487	4,466	9,658
Transfer to covered other real estate owned	(1,243)	(1,094)
Transfer to purchased, non-covered loans due to loss-share expiration	0	0	(1,665)
Balance, ending of year	7,942	12,965	9,063
Loans with Deterioration of Credit Quality [Member]
Covered Loans [Line Items]
Balance, beginning of year	137,529	271,279	271,279
Charge-offs	(361)	(2,812)	(5,558)
Accretion	1,487	4,466	9,658
Transfer to covered other real estate owned	(158)	(1,230)	(7,910)
Transfer to purchased, non-covered loans due to loss-share expiration	0	0	(50,568)
Payments received	(8,218)	(25,958)	(79,372)
Balance, ending of year	$ 130,279	$ 245,745	$ 137,529