Income Taxes (Tables)

3 Months Ended

Mar. 31, 2020

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 March 31, 2020 and 2019 due to the following (in thousands):

	2020				2019
Computed “expected” tax expense	$	36,182	21.0	%	$	48,141	21.0	%
Changes resulting from:
Foreign income tax differential	(8,112)		(4.7)	%	(4,692)		(2.0)	%
Excess tax benefit related to stock-based compensation	(17,098)		(9.9)	%	(6,385)		(2.8)	%
State taxes net of federal benefits	774		0.4	%	3,550		1.5	%
Foreign-sourced nontaxable income	14		—	%	(56)		—	%
Foreign withholding	4,585		2.7	%	5,275		2.3	%
GILTI, net of foreign tax credits	2,426		1.4	%	2,433		1.1	%
Change in valuation allowance and remeasurement of related deferred tax asset	7,651		4.4	%	3,289		1.4	%
Other	(1,183)		(0.7)	%	5,579		2.4	%
Provision for income taxes	$	25,239	14.6	%	$	57,134	24.9	%