Investments (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Net unrealized investment gains (losses) on fixed maturity securities, net of tax
Reclassification of net realized investment (gains) losses to net income	$ 2,283	[1],[2]	$ (915)	[1],[3]	$ 5,624	[1],[2]	$ 13,566	[1],[3]
Fixed Maturity Securities [Member]
Net unrealized investment gains (losses) on fixed maturity securities, net of tax
Beginning of period	317,791		220,668		146,489		423,004
Change in unrealized investment gains and losses	(10,189)		(41,288)		163,613		(231,116)
Reclassification of net realized investment (gains) losses to net income	(1,824)		1,193		(4,324)		(11,315)
End of period	305,778		180,573		305,778		180,573
Equity securities [Member]
Net unrealized investment gains (losses) on fixed maturity securities, net of tax
Beginning of period	7,955		3,266		4,618		720
Change in unrealized investment gains and losses	(1,594)		(679)		2,584		3,840
Reclassification of net realized investment (gains) losses to net income	(459)		(278)		(1,300)		(2,251)
End of period	$ 5,902		$ 2,309		$ 5,902		$ 2,309

[1] All amounts are net of tax.

[2] The pretax amounts reclassified from accumulated other comprehensive income (loss), $3,512 and $8,652, are included in net realized investment gains and losses and the related tax expenses, $1,229 and $3,028, are included in income tax expense in the Consolidated Statements of Operations for the three and nine months ended September 30, 2014, respectively.

[3] The pretax amounts reclassified from accumulated other comprehensive income (loss), $(1,407) and $20,872, are included in net realized investment gains and losses and the related tax expenses (benefits), $(492) and $7,306, are included in income tax expense in the Consolidated Statements of Operations for the three and nine months ended September 30, 2013, respectively.