Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
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Mar. 31, 2019 |
Dec. 31, 2018 |
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Income tax expense benefit on interest rate swap | $ 181 | $ 49 |
| Accrued expenses/Other current assets | Fair Value, Measurements, Recurring | Level 2 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Interest rate swap agreements | $ 727 | $ 195 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities. No definition available.
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- Definition Refers to income tax expense benefit on interest rate swap agreements. No definition available.
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