Comprehensive Income Information

9 Months Ended

Sep. 30, 2011

Comprehensive Income Information [Abstract]

Comprehensive Income Information

12. Comprehensive Income Information

		00,000			00,000		00,000			00,000
	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011			2010
Net income	$	67,930		$	62,731	$	232,523		$	137,320
Other comprehensive income (loss):
Amortization of benefits liability, net of tax		286			332		847			2,814
Change in cumulative foreign currency translation adjustment		(1,054	)		371		(730	)		191
Unrealized holding losses on available-for-sale investments, net of tax		(6,659	)		—		(6,659	)		—
Comprehensive income	$	60,503		$	63,434	$	225,981		$	140,325