Debt (Schedule of Convertible Notes) (Details) - Convertible notes - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Long-Term Debt
Principal	$ 1,725,000	$ 1,725,000
Less: Unamortized debt discount and transaction costs	188,764	312,117
Carrying value	1,536,236	1,412,883
Contractual interest expense	65,406	30,832
Amortization of debt discount and transaction costs	118,566	52,518
Interest expense	$ 183,972	$ 83,350