Acquisitions Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 1,509,259	$ 1,498,988	$ 1,237,894
Gryphon Technologies
Business Acquisition [Line Items]
Cash and cash equivalents	20,184
Receivables	56,151
Prepaid expenses	1,939
Taxes receivable - current	1,418
Goodwill	256,346
Other intangible assets	69,067
Operating lease right of use assets	5,479
Property and equipment	2,736
Other assets	352
Accounts payable	(12,221)
Accrued salaries and related expenses	(20,411)
Contract liabilities	(4,773)
Operating lease obligations—current	(1,243)
Accrued expenses and other current liabilities	(1,372)
Deferred income taxes	(13,568)
Operating lease obligations—long term	(4,287)
Net assets acquired and liabilities assumed	$ 355,797