Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Fixed maturities - available for sale, amortized cost	$ 5,709,509	$ 5,116,600
Equity securities - available for sale, cost	15	15
Other invested assets, cost	405,734	385,776
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	3,000	3,000
Common stock, shares issued	1,000	1,000
Common stock, shares outstanding	1,000	1,000
Accumulated other comprehensive income (loss), deferred income tax expense (benefit)	$ 51,996	$ 47,195
Long Term Subordinated Debt [Member]
Debt instrument, stated interest rate	6.60%	6.60%
Debt instrument, maturity date	May 01, 2067
Senior Notes 4.868% [Member] | Senior Notes [Member]
Debt instrument, stated interest rate	4.868%
Debt instrument, maturity date	Jun. 01, 2044
Senior Notes 5.4% [Member] | Senior Notes [Member]
Debt instrument, stated interest rate	5.40%	5.40%
Debt instrument, maturity date	Oct. 15, 2014