Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating activities:
Net income	$ 440,093	$ 493,826
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	99,841	93,244
Stock-based compensation expense	90,247	77,281
Deferred taxes	3,091	(16,153)
Gain from sale of divested operation	0	(135,410)
Loss on impairment of lease related assets	527	18,727
Reduction in the carrying amount of operating lease right-of-use assets	32,167	35,357
Amortization and write-off of deferred financing fees	2,548	2,330
Gain on de-designated swaps	(5,038)	(5,101)
Changes in assets and liabilities, net of acquisitions and divestitures:
Fees receivable, net	172,907	294,569
Deferred commissions	55,063	54,053
Prepaid expenses and other current assets	(22,525)	(18,667)
Other assets	(28,533)	(30,738)
Deferred revenues	15,935	36,704
Accounts payable and accrued and other liabilities	(297,523)	(299,561)
Cash provided by operating activities	558,800	600,461
Investing activities:
Additions to property, equipment and leasehold improvements	(52,027)	(46,694)
Acquisition of business	(2,000)	0
Proceeds from sale of divested operation	0	156,057
Cash (used in) provided by investing activities	(54,027)	109,363
Financing activities:
Proceeds from employee stock purchase plan	14,460	13,240
Payments of deferred financing fees	(2,972)	0
Proceeds from revolving credit facility	274,400	0
Payments on long-term debt	(274,400)	(3,600)
Purchases of treasury stock	(564,717)	(238,372)
Cash used in financing activities	(553,229)	(228,732)
Net (decrease) increase in cash and cash equivalents and restricted cash	(48,456)	481,092
Effects of exchange rates on cash and cash equivalents	(35,358)	(6,263)
Cash and cash equivalents and restricted cash, beginning of period	1,319,599	698,599
Cash and cash equivalents and restricted cash, end of period	$ 1,235,785	$ 1,173,428