Schedule IV (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]
Direct Premiums Written	$ 548,916	$ 417,769	$ 339,765
Ceded Premiums Written	183,808	144,404	124,682
Assumed Premiums Written	20,820	18,984	41,587
Premiums Written, Net	$ 385,928	$ 292,349	$ 256,670
premiums assumed as percentage of net premiums	5.39479%	6.50%	16.20252%