Deferred Acquisition Costs and Value of Business Acquired (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 01, 2013
DAC
Balance at the beginning of the period	$ 314,071	$ 172,416	$ 177,781
Capitalized additions	110,315	80,486	94,826
Amortization and writedowns	(41,045)	(55,490)	(51,434)
Unrealized investment (gains) losses	(29,933)	71,601	(48,757)
Balance at the end of the period	353,408	314,071	172,416
VOBA
Balance at the beginning of the period	29,217	32,045	42,052
Amortization and writedowns	(3,801)	(4,155)	(9,045)
Unrealized investment (gains) losses	(130)	1,327	(962)
Balance at the end of the period	25,286	29,217	32,045
Total
Balance at the beginning of the period	343,288	204,461	219,833
Capitalized additions	110,315	80,486	94,826
Amortization and writedowns	(44,846)	(59,645)	(60,479)
Unrealized investment (gains) losses	(30,063)	72,928	(49,719)
Balance at the end of the period	378,694	343,288	204,461
Estimated future amortization of VOBA
Estimated future amortization of VOBA in 2015	3,900
Estimated future amortization of VOBA in 2016	3,900
Estimated future amortization of VOBA in 2017	3,900
Estimated future amortization of VOBA in 2018	3,900
Estimated future amortization of VOBA in 2019	3,900
Correction
DAC
Balance at the beginning of the period		45,058		45,058
Balance at the end of the period				45,058
VOBA
Balance at the beginning of the period		0		0
Balance at the end of the period				0
Total
Balance at the beginning of the period		45,058		45,058
Balance at the end of the period				$ 45,058