Revenue and Related Matters - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets:
Fees receivable, gross	$ 1,610,228	$ 1,565,786
Contract assets recorded in Prepaid expenses and other current assets	28,791	21,183
Contract liabilities:
Deferred revenues	2,640,515	2,443,762
Non-current deferred revenues recorded in Other liabilities	33,490	39,115
Total contract liabilities	$ 2,674,005	$ 2,482,877