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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Payables And Accruals [Abstract] |  |
Deposits | $ 21,088 | $ 9,881
Restricted contract funds | 12,165 | 68,138
Accrued IT and software licensing costs | 1,702 | 2,157
Accrued taxes and insurance premiums | 5,267 | 4,327
Accrued facilities rental and lease exit costs | 1,291 | 780
Accrued interest | 212 | 214
Accrued professional services | 3,068 | 2,094
Accrued dividends | 2,643 | 2,641
Contingent and contractual liabilities from acquisitions | 1,245 | 683
Interest rate swap liability - current | 3,026 | 3,693
Other accrued expenses and current liabilities | 9,789 | 6,300
Total accrued expenses and other current liabilities | $ 61,496 | $ 100,908

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