Income Taxes (Tables)

3 Months Ended

Mar. 31, 2016

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, 2016 and 2015 due to the following (in thousands):

	2016					2015
Computed “expected” tax expense	$	54,919		35.0	%	$	48,877		35.0	%
Changes resulting from:
Foreign income tax differential	(4,769		)	(3.0	)%	(4,495		)	(3.2	)%
State taxes net of federal benefits	1,832			1.1	%	1,994			1.4	%
Foreign-sourced nontaxable income	(2,178		)	(1.4	)%	(2,882		)	(2.0	)%
Other	(2,864		)	(1.8	)%	2,001			1.4	%
Provision for income taxes	$	46,940		29.9	%	$	45,495		32.6	%