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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Amounts owed to employees participating in the deferred compensation plan | $ 3,000 |  | $ 3,000 |  | $ 3,200
Contingent consideration liability | 1,000 |  | 1,000 |  |
Adjustment to contingent consideration liability | 2,310 | $ 0 | 2,310 | $ 0 |
Obligations |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Balance at beginning of period |  |  | 3,340 |  |
New level 3 liability |  |  | 0 |  |
Total gains reported in earnings |  |  | 2,310 |  |
Settlement of Level 3 liabilities |  |  | 0 |  |
Balance at end of period | 1,030 |  | 1,030 |  |
Restaurant Magic |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Contingent consideration liability | 1,000 |  | 1,000 |  | $ 3,300
Adjustment to contingent consideration liability | 2,300 |  |  |  |
Fair Value, Inputs, Level 2 | Convertible Notes | Convertible Senior Notes due 2024 |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Fair value of debt | 20,700 |  | 20,700 |  |
Fair Value, Inputs, Level 2 | Convertible Notes | Convertible Senior Notes Due 2026 |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Fair value of debt | $ 144,700 |  | $ 144,700 |  |

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