Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Comprehensive income
Net income	$ 70,480	$ 80,862	$ 73,486
Other comprehensive income (loss), net of taxes:
Change in net unrealized gains and losses on fixed maturities and equity securities	155,633	86,133	204,331
Change in net funded status of pension and other postretirement benefit obligations	(3,087)	(1,612)	(21)
Other comprehensive income	152,546	84,521	204,310
Total	$ 223,026	$ 165,383	$ 277,796