Income Taxes - Constituents of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Non-current gross deferred tax assets:
Intangible asset in connection with change in tax structure	$ 424,156	$ 437,500
Stock-based compensation expense	13,294	15,042
Federal and state tax credit carryforwards	10,171	8,491
Inventory and revenue related	5,976	2,934
Bonuses, commissions, and other compensation	4,932	1,609
Depreciation	4,211	3,522
Foreign net operating losses	602	4,286
Other	4,342	3,550
Gross non-current deferred tax assets	467,684	476,934
Valuation allowance	(8,568)	(7,312)
Deferred Tax Assets, Net, Noncurrent	459,116	469,622
Non-current gross deferred tax liabilities:
GILTI tax basis differences in connection with change in tax structure	(339,325)	(350,000)
Other GILTI tax basis differences	39	2,446
Deferred Tax Liabilities, Gross, Current	$ 339,364	$ 352,446