INVESTMENTS, Aging of Gross Unrealized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair value [Abstract]
Less than 12 months	$ 154,742	$ 89,429
12 months or longer	4,614	9,116
Total fair value	159,356	98,545
Gross unrealized losses [Abstract]
Less than 12 months	3,804	863
12 months or longer	145	165
Total gross unrealized losses	3,949	1,028
Debt Securities [Member]
Fair value [Abstract]
Less than 12 months	142,952	85,746
12 months or longer	4,530	8,916
Total fair value	147,482	94,662
Gross unrealized losses [Abstract]
Less than 12 months	1,954	402
12 months or longer	139	129
Total gross unrealized losses	2,093	531
United States Government Obligations and Authorities [Member]
Fair value [Abstract]
Less than 12 months	30,464	9,171
12 months or longer	659	3,809
Total fair value	31,123	12,980
Gross unrealized losses [Abstract]
Less than 12 months	303	22
12 months or longer	17	53
Total gross unrealized losses	320	75
Obligations of States and Political Subdivisions [Member]
Fair value [Abstract]
Less than 12 months	16,652	27,426
12 months or longer	0	246
Total fair value	16,652	27,672
Gross unrealized losses [Abstract]
Less than 12 months	40	66
12 months or longer	0	4
Total gross unrealized losses	40	70
Corporate [Member]
Fair value [Abstract]
Less than 12 months	87,176	42,888
12 months or longer	3,590	4,861
Total fair value	90,766	47,749
Gross unrealized losses [Abstract]
Less than 12 months	1,420	260
12 months or longer	70	72
Total gross unrealized losses	1,490	332
International [Member]
Fair value [Abstract]
Less than 12 months	8,660	6,261
12 months or longer	281	0
Total fair value	8,941	6,261
Gross unrealized losses [Abstract]
Less than 12 months	191	54
12 months or longer	52	0
Total gross unrealized losses	243	54
Equity Securities [Member]
Fair value [Abstract]
Less than 12 months	11,790	3,683
12 months or longer	84	200
Total fair value	11,874	3,883
Gross unrealized losses [Abstract]
Less than 12 months	1,850	461
12 months or longer	6	36
Total gross unrealized losses	$ 1,856	$ 497