Income Taxes (Tables)

3 Months Ended

Mar. 31, 2015

Income Tax Disclosure [Abstract]

Summary of Provision for Income Taxes and U.S. Federal Tax Rate

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, 2015 and 2014 due to the following (in thousands):

	2015					2014
Computed “expected” tax expense	$	48,877		35.0	%	$	38,056		35.0	%
Changes resulting from:
Foreign income tax differential		(4,495	)	(3.2	)		(4,408	)	(4.0	)
State taxes net of federal benefits		1,994		1.4			1,219		1.1
Foreign-sourced nontaxable income		(2,882	)	(2.0	)		(3,138	)	(2.9	)
Other		2,001		1.4			1,293		1.3
Provision for income taxes	$	45,495		32.6	%	$	33,022		30.5	%