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Accrued Expenses (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Payables and Accruals [Abstract] |  |
Accrued compensation and benefits | $ 28,172 | $ 26,507
Accrued professional service fees | 5,344 | 7,248
Accrued telecommunications and hosting | 4,570 | 2,493
Accrued income taxes payable | 3,227 | 4,063
Accrued preferred dividend | 9,078 | 7,873
Accrued other | 18,935 | 17,803
Total | $ 69,326 | $ 65,987

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