Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income	$ 172,515	$ 164,100
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	48,349	56,264
Stock-based compensation expense	32,121	36,086
Deferred taxes	(7,502)	3,883
Loss on impairment of lease related assets, net	23,878	0
Reduction in the carrying amount of operating lease right-of-use assets	17,951	18,575
Amortization and write-off of deferred financing fees	1,133	923
Gain on de-designated swaps	(29,896)	(15,765)
Changes in assets and liabilities:
Fees receivable, net	30,700	54,192
Deferred commissions	18,909	(237)
Prepaid expenses and other current assets	(13,596)	(9,933)
Other assets	(1,082)	(10,081)
Deferred revenues	195,306	131,786
Accounts payable and accrued and other liabilities	(321,001)	(272,495)
Cash provided by operating activities	167,785	157,298
Investing activities:
Additions to property, equipment and leasehold improvements	(17,293)	(12,521)
Cash used in investing activities	(17,293)	(12,521)
Financing activities:
Proceeds from employee stock purchase plan	6,949	5,357
Payments on revolving credit facility	0	(5,000)
Payments on borrowings	(1,331)	(5,127)
Purchases of treasury stock	(451,070)	(398,450)
Cash used in financing activities	(445,452)	(403,220)
Net decrease in cash and cash equivalents and restricted cash	(294,960)	(258,443)
Effects of exchange rates on cash and cash equivalents	(5,358)	(8,145)
Cash and cash equivalents and restricted cash, beginning of period	760,602	712,583
Cash and cash equivalents and restricted cash, end of period	$ 460,284	$ 445,995