Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net income	$ 295,783	$ 172,515
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	46,631	48,349
Stock-based compensation expense	45,048	32,121
Deferred taxes	(7,866)	(7,502)
Gain from sale of divested operation	(139,316)	0
Loss on impairment of lease related assets	8,720	23,878
Reduction in the carrying amount of operating lease right-of-use assets	17,644	17,951
Amortization and write-off of deferred financing fees	1,161	1,133
Loss (gain) on de-designated swaps	1,393	(29,896)
Changes in assets and liabilities, net of acquisitions and divestitures:
Fees receivable, net	36,177	30,700
Deferred commissions	19,635	18,909
Prepaid expenses and other current assets	(18,370)	(13,596)
Other assets	(14,799)	(1,082)
Deferred revenues	155,153	195,306
Accounts payable and accrued and other liabilities	(282,315)	(321,001)
Cash provided by operating activities	164,679	167,785
Investing activities:
Additions to property, equipment and leasehold improvements	(21,122)	(17,293)
Proceeds from sale of divested operation	158,733	0
Cash provided by (used in) investing activities	137,611	(17,293)
Financing activities:
Proceeds from employee stock purchase plan	7,358	6,949
Payments on borrowings	(1,800)	(1,331)
Purchases of treasury stock	(106,850)	(451,070)
Cash used in financing activities	(101,292)	(445,452)
Net increase (decrease) in cash and cash equivalents and restricted cash	200,998	(294,960)
Effects of exchange rates on cash and cash equivalents	(5,485)	(5,358)
Cash and cash equivalents and restricted cash, beginning of period	698,599	760,602
Cash and cash equivalents and restricted cash, end of period	$ 894,112	$ 460,284