SHAREHOLDERS' EQUITY, Reconciliation of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Before Tax [Roll Forward]
Accumulated other comprehensive income, beginning of period	$ 10,195	$ 14,382	$ 6,111	$ 12,417
Other comprehensive income before reclassifications	5,036	(2,478)	10,606	2,239
Reclassification adjustment for realized gains included in net income	(30)	(1,497)	(1,516)	(4,249)
Other comprehensive income after reclassifications	5,006	(3,975)	9,090	(2,010)
Accumulated other comprehensive income, end of period	15,201	10,407	15,201	10,407
Income Tax [Roll Forward]
Accumulated other comprehensive income, beginning of period	(3,791)	(5,457)	(2,247)	(4,699)
Other comprehensive income before reclassifications	(1,828)	825	(3,931)	(981)
Reclassification adjustment for realized gains included in net income	23	584	582	1,632
Other comprehensive income after reclassifications	(1,805)	1,409	(3,349)	651
Accumulated other comprehensive income, end of period	(5,596)	(4,048)	(5,596)	(4,048)
Net [Roll Forward]
Balance, beginning of period			232,582
Other comprehensive income before reclassifications	3,208	(1,653)	6,675	1,258
Reclassification adjustment for realized gains included in net income	(7)	(913)	(934)	(2,617)
Other comprehensive income after reclassifications	3,201	(2,566)	5,741	(1,359)
Balance, end of period	247,004		247,004
Accumulated Other Comprehensive Income [Member]
Net [Roll Forward]
Balance, beginning of period	6,404	8,925	3,864	7,718
Balance, end of period	$ 9,605	$ 6,359	$ 9,605	$ 6,359