Fair Value Measurements - Recurring basis Level 3 rollforward (Details 2) - Recurring basis - Level 3 - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period		$ 5,096		$ 5,878
Net income (loss)		0		0
Other comprehensive income (loss)		(66)		(143)
Settlements		(207)		(912)
Balance at the end of the period		4,823		4,823
Total gains (losses) for the period included in net income attributable to the change in unrealized gains and losses relating to assets and liabilities		0		0
Fixed maturities available-for-sale, Corporate debt securities
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period	$ 15,056	5,065	$ 4,538	5,842
Net income (loss)	0	0	0	0
Other comprehensive income (loss)	245	(66)	720	(143)
Settlements	(594)	(216)	(1,787)	(916)
Transfers into Level 3			11,236
Balance at the end of the period	14,707	4,783	14,707	4,783
Total gains (losses) for the period included in net income attributable to the change in unrealized gains and losses relating to assets and liabilities	0	0	0	0
Fixed maturities available-for-sale, Asset-backed securities
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period		31		36
Net income (loss)		0		0
Other comprehensive income (loss)		0		0
Settlements		9		4
Balance at the end of the period		40		40
Total gains (losses) for the period included in net income attributable to the change in unrealized gains and losses relating to assets and liabilities		0		0
Embedded Derivative Financial Instruments
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period	30,687	2,919	11,257	6,407
Net income (loss)	590	6,858	20,020	3,370
Other comprehensive income (loss)	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3			0
Balance at the end of the period	31,277	9,777	31,277	9,777
Total gains (losses) for the period included in net income attributable to the change in unrealized gains and losses relating to assets and liabilities	$ 590	$ 6,858	$ 20,020	$ 3,370