Basis of Presentation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Beginning balance	$ 122,214	[1]	$ 367,089	[1]
Other comprehensive income (loss) before reclassifications	78,512	[1]	(3,874)	[1]
Amounts reclassified from accumulated other comprehensive income (loss)	(1,104)	[1]	(4,460)	[1]
Net current-period other comprehensive income (loss)	77,408	[1]	(8,334)	[1]
Ending balance	199,622	[1]	358,755	[1]
Unrealized Gains and Losses on Fixed Maturities and Equity Securities
Beginning balance	133,990	[1],[2]	382,400	[1],[2]
Other comprehensive income (loss) before reclassifications	78,512	[1],[2]	(3,874)	[1],[2]
Amounts reclassified from accumulated other comprehensive income (loss)	(1,104)	[1],[2]	(4,460)	[1],[2]
Net current-period other comprehensive income (loss)	77,408	[1],[2]	(8,334)	[1],[2]
Ending balance	211,398	[1],[2]	374,066	[1],[2]
Defined Benefit Plans
Defined Benefit Plans, Beginning balance	(11,776)	[1]	(15,311)	[1]
Other comprehensive income (loss) before reclassifications	0	[1]	0	[1]
Amounts reclassified from accumulated other comprehensive income (loss)	0	[1]	0	[1]
Net current-period other comprehensive income (loss)	0	[1]	0	[1]
Defined Benefit Plans, Ending balance	$ (11,776)	[1]	$ (15,311)	[1]

[1] All amounts are net of tax.

[2] The pretax amounts reclassified from accumulated other comprehensive income, $1,699 and $6,862, are included in net realized investment gains and losses and the related tax expenses, $595 and $2,402, are included in income tax expense in the Consolidated Statements of Operations for the three months ended March 31, 2014 and 2013, respectively.