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Supplemental Consolidated Balance Sheet Information - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Accrued Liabilities and Other Liabilities [Abstract] |  |
Accrued vacation | $ 11,221 | $ 10,294
Accrued commissions | 11,122 | 12,678
Accrued bonuses | 8,292 | 6,573
Accrued payroll | 4,494 | 2,631
Estimated health insurance claims | 1,814 | 1,224
Accrued interest | 1,455 | 1,455
ESPP employee contributions | 5,349 | 4,269
Customer deposits | 26,517 | 18,283
Operating lease liabilities | 6,008 | 4,541
Accrued other liabilities | 7,854 | 6,308
Accrued expenses and other current liabilities | $ 84,126 | $ 68,256

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