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Accrued Salaries and Benefits - Schedule of Accrued Salaries and Benefits (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Employee Related Liabilities Current [Abstract] |  |
Accrued bonuses, liability-classified awards, and commissions | $ 24,464 | $ 17,660
Accrued salaries | 21,282 | 16,170
Accrued paid time off and leave | 15,046 | 12,157
Social security tax deferral | 10,457 |
Accrued medical | 3,238 | 3,063
Accrued payroll taxes and withholdings | 1,033 | 930
Other | 4,992 | 2,150
Total accrued salaries and benefits | $ 80,512 | $ 52,130

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable for statutory payroll taxes incurred through that date and withheld from employees pertaining to services received from them, including entity's matching share of the employees FICA taxes and contributions to the state and federal unemployment insurance programs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6935-107765 + Details
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