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Fair Value Measurements (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Income tax expense benefit on interest rate swap |  | $ 367 | $ 49 |
Current portion of earn-out obligations | $ 31,700 | 31,700 | 0 |
Earn-out obligation adjustment |  | 1,900 | 0 | $ 0
Fair Value, Measurements, Recurring |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Earn-out obligation adjustment | 1,900 |  |  |
Other current assets | Fair Value, Measurements, Recurring | Level 2 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Interest rate swaps | 1,473 | 1,473 | 195 |
Current Portion of Earn Out Obligations | Fair Value, Measurements, Recurring | Level 3 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Current portion of earn-out obligations | $ 31,700 | $ 31,700 | $ 0 |

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