Income Taxes (Tables)

6 Months Ended

Jun. 30, 2021

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 2021 and 2020 to income before income taxes for the three months ended June 30, 2021 and 2020 due to the following (in thousands):

	2021				2020
Computed “expected” tax expense	$	55,129	21.0	%	$	44,443	21.0	%
Changes resulting from:
Foreign income tax differential	(3,899)		(1.5)	%	(4,155)		(2.0)	%
Excess tax benefit related to stock-based compensation	(6,059)		(2.3)	%	(12,720)		(6.0)	%
State taxes net of federal benefits	2,949		1.1	%	3,902		1.8	%
Change in UK statutory rate	6,470		2.5	%	—		—	%
Foreign withholding	(316)		(0.1)	%	3,515		1.7	%
GILTI, net of foreign tax credits	2,899		1.1	%	2,402		1.1	%
Foreign sourced non taxable income	50		—	%	13		—	%
Change in taxes for federal uncertain tax positions	4,800		1.8	%	12,261		5.8	%
Other	4,249		1.6	%	3,479		1.7	%
Provision for income taxes	$	66,272	25.2	%	$	53,140	25.1	%