Revenue and Related Matters - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Assets:
Fees receivable, gross	$ 1,334,398		$ 1,371,680
Contract assets recorded in Prepaid expenses and other current assets	21,820		20,054
Contract liabilities:
Deferred revenues (current liability)	2,421,726		2,238,035
Non-current deferred revenues recorded in Other liabilities	46,257		48,176
Total contract liabilities	2,467,983		$ 2,286,211
Revenue recognized previously attributable to deferred revenues	$ 833,900	$ 726,700