Income Taxes (Tables)

6 Months Ended

Jun. 30, 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 June 30, 2015 and 2014 due to the following (in thousands):

	2015					2014
Computed “expected” tax expense	$	50,852		35.0	%	$	44,784		35.0	%
Changes resulting from:
Foreign income tax differential		(5,747	)	(4.0	)		(5,761	)	(4.5	)
State taxes net of federal benefits		2,022		1.4			1,466		1.2
Foreign-sourced nontaxable income		(4,061	)	(2.8	)		(3,484	)	(2.7	)
Other		3,547		2.5			2,401		1.8
Provision for income taxes	$	46,613		32.1	%	$	39,406		30.8	%