Fair Value Measurements - Recurring basis Level 3 rollforward (Details 2) - Recurring basis - Level 3 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period		$ 5,362		$ 5,878
Net income (loss)		0		0
Other comprehensive income (loss)		(49)		(77)
Settlements		(217)		(705)
Balance at the end of the period		5,096		5,096
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	$ 15,542	5,329	$ 4,538	5,842
Net income (loss)	0	0	0	0
Other comprehensive income (loss)	109	(49)	475	(77)
Settlements	(595)	(215)	(1,193)	(700)
Transfers into Level 3			(11,236)
Balance at the end of the period	15,056	5,065	15,056	5,065
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		33		36
Net income (loss)		0		0
Other comprehensive income (loss)		0		0
Settlements		(2)		(5)
Balance at the end of the period		31		31
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	21,707	9,177	11,257	6,407
Net income (loss)	8,980	(6,258)	19,430	(3,488)
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	30,687	2,919	30,687	2,919
Total gains (losses) for the period included in net income attributable to the change in unrealized gains and losses relating to assets and liabilities	$ 8,980	$ (6,258)	$ 19,430	$ (3,488)