Income Taxes - Current and Long-Term Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Accrued liabilities	$ 81,302	$ 67,577
Operating leases	51,450	54,860
Loss and credit carryforwards	23,852	14,372
Assets relating to equity compensation	14,981	16,842
Other assets	16,290	20,364
Gross deferred tax assets	187,875	174,015
Property, equipment and leasehold improvements	(9,852)	(15,137)
Intangible assets	(172,723)	(212,498)
Prepaid expenses	(46,105)	(49,221)
Other liabilities	(13,152)	(5,799)
Gross deferred tax liabilities	(241,832)	(282,655)
Valuation allowance	(15,717)	(1,556)
Net deferred tax liabilities	$ (69,674)	$ (110,196)