Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2011

Comprehensive Income

Summary Of Comprehensive Income

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income	$	98,178	$	85,461	$	193,558	$	160,449
Other comprehensive income:
Actuarially determined long-term liability adjustments		67		269		133		538
Total other comprehensive income		67		269		133		538
Comprehensive income	$	98,245	$	85,730	$	193,691	$	160,987