Income Taxes

3 Months Ended

Mar. 31, 2012

Income Taxes [Abstract]

Income Taxes

8. Income Taxes

The provision for income taxes differs from amounts computed by applying the U.S. federal tax rate of 35% to income before income taxes for the three months ended March 31, 2012 and 2011 due to the following (in thousands):

	2012					2011
Income tax expense at federal statutory rate	$	21,112		35.0	%	$	16,505		35.0	%
Changes resulting from:
Foreign income tax differential		(2,716	)	(4.5	)		(1,905	)	(4.0	)
State taxes, net of federal benefit		792		1.3			788		1.7
Foreign-sourced nontaxable income		(1,894	)	(3.1	)		(764	)	(1.6	)
Other		951		1.5			199		0.3
Provision for income taxes and rate	$	18,245		30.2	%	$	14,823		31.4	%

At March 31, 2012 and December 31, 2011, notes payable and other obligations—noncurrent, included liabilities for unrecognized income tax benefits of $5.4 million and $5.0 million, respectively. During the three months ended March 31, 2012 and 2011 the Company recognized additional liabilities of $0.4 million and $0.1 million, respectively. During the three months ended March 31, 2012 and 2011, amounts recorded for accrued interest and penalties expense related to the unrecognized income tax benefits were not significant.

The Company files numerous consolidated and separate income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. The statute of limitations for the Company's U.S. federal income tax returns has expired for years prior to 2008. The statute of limitations for the Company's U.K. income tax returns has expired for years prior to 2010. The statute of limitations has expired for years prior to 2008 for the Company's Czech Republic income tax returns.