SCHEDULE IV - REINSURANCE (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums									$ 370,499	$ 342,656	$ 313,842
Ceded to Other Companies									562	1,275	2,825
Assumed from Other Companies									21,533	38,219	52,783
Net Amount	$ 65,995	$ 65,445	$ 65,449	$ 66,446	$ 68,933	$ 65,947	$ 62,905	$ 63,842	263,335	261,627	252,743
Retrocessions associated with premiums assumed from other companies									562	1,275	2,825
Property and Casualty Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums									370,499	342,656	313,842
Ceded to Other Companies									128,697	119,248	113,882
Assumed from Other Companies									21,533	38,219	52,783
Net Amount									$ 263,335	$ 261,627	$ 252,743
% of Amount Assumed to Net									8.00%	14.10%	19.80%