Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets, Current [Abstract]
Cash and Cash Equivalents, at Carrying Value	$ 84,991	$ 172,747
Accounts Receivable, after Allowance for Credit Loss, Current	452,573	394,868
Prepaid Expense and Other Assets, Current	92,947	95,064
Income Taxes Receivable, Current	21,785	18,524
Total current assets	652,296	681,203
Long-term assets
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization	132,051	191,003
Operating lease assets	91,263	121,574
Goodwill	571,197	808,988
Deferred tax assets, net	8,498	38,151
Other intangible assets, net	164,808	198,433
Income Taxes Receivable, Noncurrent	31,781	44,673
Other long-term assets	101,486	101,573
Total long-term assets	1,101,084	1,504,395
Total assets	1,753,380	2,185,598
Liabilities, Current [Abstract]
Accounts payable	84,180	96,577
Employee-related Liabilities, Current	137,636	146,184
Other accrued expenses	22,578	32,217
Accrued Income Taxes, Current	3,007	4,909
Deferred revenue	64,752	81,171
Current operating lease liabilities	33,358	38,271
Other Liabilities, Current	8,425	3,698
Total current liabilities	353,936	403,027
Liabilities, Noncurrent [Abstract]
Long-Term Line of Credit, Noncurrent	975,000	995,000
Deferred tax liabilities, net	17,457	3,137
Accrued Income Taxes, Noncurrent	0	0
Non-current operating lease liabilities	71,008	96,809
Other long-term liabilities	67,860	72,083
Total long-term liabilities	1,131,325	1,167,029
Total liabilities	1,485,261	1,570,056
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Outstanding	477	474
Additional Paid in Capital	420,181	407,415
Treasury stock at cost: 34,328,112 and 34,625,053 shares as of December 31, 2024 and December 31, 2023, respectively	(584,900)	(589,807)
Accumulated other comprehensive income (loss)	(132,121)	(89,876)
Retained Earnings (Accumulated Deficit)	546,617	870,429
Noncontrolling interest	17,865	16,907
Total stockholders' equity	268,119	615,542
Total liabilities and stockholders' equity and mezzanine equity	$ 1,753,380	$ 2,185,598