CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net income	$ 105,957	$ 68,895
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	41,243	42,698
Amortization of right of use asset	4,461	4,989
Stock-based compensation expense	32,890	24,153
Impairment charge	0	12,736
Change in long-term retirement benefit obligations	(12,215)	(13,760)
Other – net	(2,371)	(1,360)
Changes in operating assets and liabilities:
Accounts receivable – net	61,208	58,542
Other assets	1,094	(2,517)
Accounts payable, accrued payroll and other liabilities	(103,632)	(79,306)
Unexpired subscriptions	2,132	1,051
Other noncurrent assets and liabilities	2,543	3,661
Net cash provided by operating activities	133,310	119,782
Cash flows from investing activities
Purchases of marketable securities	(185,040)	(43,643)
Maturities of marketable securities	101,562	47,103
Capital expenditures	(14,054)	(10,792)
Other – net	1,362	2,302
Net cash used in investing activities	(96,170)	(5,030)
Long-term obligations:
Dividends paid	(40,032)	(33,195)
Payment of contingent consideration	(1,724)	(1,724)
Capital shares:
Repurchases	(42,004)	(43,591)
Share-based compensation tax withholding	(18,582)	(11,649)
Net cash used in financing activities	(102,342)	(90,159)
Net (decrease)/increase in cash, cash equivalents and restricted cash	(65,202)	24,593
Effect of exchange rate changes on cash	(964)	(29)
Cash, cash equivalents and restricted cash at the beginning of the period	303,172	235,173
Cash, cash equivalents and restricted cash at the end of the period	$ 237,006	$ 259,737