Acquisitions (Tables)

6 Months Ended

Jun. 30, 2011

Acquisitions

Consolidated Income Statement Information

	Three Months Ended June 30,
	2010						2011
	As Reported		Pro Forma Adjustments		Pro Forma		As Reported
Revenues	$	423,060	$	13,820	$	436,880	$	383,327
Net income	$	102,452	$	4,645	$	107,097	$	102,999

	Six Months Ended June 30,
	2010						2011
	As Reported		Pro Forma Adjustments		Pro Forma		As Reported
Revenues	$	752,755	$	27,456	$	780,211	$	826,224
Net income	$	166,986	$	10,950	$	177,936	$	193,064