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Acquisitions - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed on Preliminary Purchase Price Allocation (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Jul. 06, 2021
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Contract assets | $ 600,109 | $ 579,216 |
Goodwill | 1,412,834 | 1,412,690 |
Contract liabilities | $ (172,932) | $ (171,671) |
BlackHorse Solutions, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Cash and cash equivalents |  |  | $ 15,428
Accounts receivable |  |  | 3,351
Contract assets |  |  | 5,979
Prepaid expenses and other current assets |  |  | 937
Property and equipment |  |  | 2,239
Right of use assets, operating leases |  |  | 6,157
Goodwill |  |  | 143,086
Intangible assets |  |  | 65,000
Accounts payable |  |  | (2,326)
Accrued expenses and other current liabilities |  |  | (17,190)
Contract liabilities |  |  | (320)
Short-term lease liabilities, operating leases |  |  | (1,011)
Long-term lease liabilities, operating leases |  |  | (5,146)
Deferred tax liabilities |  |  | (10,916)
Other long-term liabilities |  |  | (235)
Net assets acquired |  |  | $ 205,033

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