Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Employee phantom share plan liability	$ 88,504	$ 57,752
Contingent stock liability	0	130,594
Employee related accruals	63,302	98,481
Accrued professional fees	49,729	67,628
Tax related accruals	39,574	45,119
Other accrued expenses and other current liabilities	200,548	170,108
Accrued expenses and other current liabilities	$ 441,657	$ 569,682