Income Taxes (Tables)

9 Months Ended

Sep. 30, 2019

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 21% for 2019 and 2018 to income before income taxes for the three months ended September 30, 2019 and 2018 due to the following (in thousands):

	2019					2018
Computed “expected” tax expense	$	61,479		21.0	%	$	49,889		21.0	%
Changes resulting from:
Foreign income tax differential	(2,904		)	(1.0	)%	2,359			1.0	%
Excess tax benefit related to stock-based compensation	(10,059		)	(3.4	)%	(7,562		)	(3.2	)%
State taxes net of federal benefits	3,324			1.1	%	3,119			1.3	%
Foreign-sourced nontaxable income	(1		)	—	%	(5,620		)	(2.4	)%
Foreign withholding	5,150			1.8	%	4,578			1.9	%
GILTI, net of foreign tax credits	2,486			0.9	%	5,576			2.4	%
Tax reform - federal rate reduction	—					22,731			9.6	%
Other	7,477			2.6	%	4,804			2.0	%
Provision for income taxes	$	66,952		22.9	%	$	79,874		33.6	%