Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income and (Loss), Pre-Tax Amount, Beginning of period	$ 6,537	$ 150	$ 4,254
Change in net unrealized gain (loss) on investments, Pre-Tax Amount	(3,070)	6,367	(4,233)
Reclassification adjustment for realized losses, Pre-Tax Amount	(827)	20	129
Accumulated Other Comprehensive Income and (Loss), Pre-Tax Amount, End of period		6,537	150
Accumulated Other Comprehensive Income (Loss), Tax (Expense) Benefit, Beginning of period	2,526	58	1,641
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	1,187	(2,460)	1,633
Reclassification adjustment for realized losses, Tax (Expense) Benefit	319	(8)	(50)
Accumulated Other Comprehensive Income (Loss), Tax (Expense) Benefit, End of period	1,020	2,526	58
Accumulated Other Comprehensive Income (Loss), Net-of-Tax Amount, Beginning of period	4,011	92	2,613
Change in net unrealized gain (loss) on investments, Net-of-Tax Amount	(1,883)	3,907	(2,600)
Reclassification adjustment for realized losses, Net-of-Tax Amount	(508)	12	79
Accumulated Other Comprehensive Income (Loss), Net-of-Tax Amount, End of period	1,620	$ 4,011	$ 92
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income and (Loss), Pre-Tax Amount, End of period	$ 2,640