Income Taxes (Tables)

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Summary Of Company's Income Tax Provision And Effective Income Tax Rate

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Income before income taxes	$	103,820		$	63,458		$	281,217		$	155,968
Provision for income taxes	$	29,543		$	16,610		$	79,345		$	38,943
Effective income tax rate		28.5	%		26.2	%		28.2	%		25.0	%