Deferred Policy Acquisition Costs - Activity in Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance at beginning of period	$ 13,182	$ 7,659	$ 12,102	$ 5,679
Deferred policy acquisition costs	6,287	8,528	19,383	15,742
Amortization of policy acquisition costs	(6,266)	(4,605)	(18,282)	(9,839)
Net change	21	3,923	1,101	5,903
Balance at end of period	$ 13,203	$ 11,582	$ 13,203	$ 11,582