Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Comprehensive income
Net income	$ 26,671	$ 25,807
Other comprehensive income (loss), net of taxes:
Change in net unrealized gains and losses on fixed maturities and equity securities	12,583	(3,770)
Change in net funded status of pension and other postretirement benefit obligations
Other comprehensive income (loss)	12,583	(3,770)
Total	$ 39,254	$ 22,037