Investments, Roll-forward of Financial Instruments Measured at Fair Value (Details) - Fixed Maturities [Member] - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Assets measured at fair value on a recurring basis [Abstract]
Balance, beginning of period	$ 2,368	$ 2,300	$ 2,237	$ 2,207	$ 2,264	$ 2,214
Total realized gains included in earnings	57
Total unrealized gains (losses) included in other comprehensive income (loss)	(61)	68	63	34	(57)	50
Settlements	(1,000)
Balance, end of period	$ 1,364	$ 2,368	$ 2,300	$ 2,241	$ 2,207	$ 2,264