Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Stock-based compensation	$ 351,238	$ 296,646
Federal and California tax R&D credits	484,793	513,413
Foreign tax credits	2,045	0
Accruals and reserves	165,214	74,239
Operating leases	570,830	436,838
Foreign Net Operating Losses	8,043	29,894
Unrealized Gain/Loss	13,772	114,884
Other	5,420	2,543
Gross deferred tax assets	1,601,355	1,468,457
Depreciation & amortization	(388,115)	(229,142)
Operating leases	(506,403)	(400,380)
Acquisitions	(240,334)	0
Gross deferred tax liabilities	(1,134,852)	(629,522)
Valuation allowance	(318,408)	(249,844)
Net deferred tax assets	$ 148,095	$ 589,091