LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Purchased Credit-Impaired Loans, Changes in Accretable Yield) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Receivables [Abstract]
Outstanding contractual unpaid balance of purchased credit-impaired loans	$ 57,300		$ 57,300		$ 83,400
Carrying balance of purchased credit-impaired loans	38,674	$ 5,409	38,674	$ 5,409	58,600
Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	11,035	2,149	10,375	0
Additions	0	0	0	2,239
Accretion to interest income	(1,811)	(68)	(6,349)	(158)
Disposals	(899)	0	(1,018)	0
Reclassifications from non-accretable difference	1,120	0	6,437	0
Balance, end of period	9,445	$ 2,081	9,445	$ 2,081
Non-accretable difference	$ 19,200		$ 19,200		$ 29,500