Fair Value Measurements (Details 2) (Recurring basis, Level 3, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Recurring Level 3 financial assets and liabilities
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 0	$ 0	$ 0	$ 0
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period	226,534	262,596	259,642	267,392
Net income (loss)	(17)		(17)
Realized and unrealized gains (losses) included in other comprehensive income (loss)	(4,080)	6,662	(9,602)	25,233
Settlements	(6,405)	(12,085)	(33,991)	(35,452)
Balance at the end of the period	216,032	257,173	216,032	257,173
Fixed maturities available-for-sale, Corporate debt securities
Recurring Level 3 financial assets and liabilities
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period	6,371	1,796	6,652	1,822
Net income (loss)	0		0
Realized and unrealized gains (losses) included in other comprehensive income (loss)	(111)	(5)	(36)	(28)
Settlements	(155)	1	(511)	(2)
Balance at the end of the period	6,105	1,792	6,105	1,792
Fixed maturities available-for-sale, Asset-backed securities
Recurring Level 3 financial assets and liabilities
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period	220,134	260,768	252,958	265,538
Net income (loss)	0		0
Realized and unrealized gains (losses) included in other comprehensive income (loss)	(3,957)	6,667	(9,551)	25,261
Settlements	(6,250)	(12,086)	(33,480)	(35,450)
Balance at the end of the period	209,927	255,349	209,927	255,349
Fixed maturities available-for-sale, Collateralized debt obligations
Recurring Level 3 financial assets and liabilities
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
Recurring Level 3 financial assets and liabilities
Balance at the beginning of the period	29	32	32	32
Net income (loss)	(17)		(17)
Realized and unrealized gains (losses) included in other comprehensive income (loss)	(12)	0	(15)	0
Settlements	0	0	0	0
Balance at the end of the period	$ 0	$ 32	$ 0	$ 32