Income Taxes (Tables)

6 Months Ended

Jun. 30, 2011

Income Taxes

Summary of Company's Income Tax Provision and Effective Income Tax Rate

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Income before income taxes	$	94,959		$	50,527		$	177,397		$	92,510
Provision for income taxes	$	27,263		$	12,603		$	49,802		$	22,333
Effective income tax rate		28.7	%		24.9	%		28.1	%		24.1	%