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Other Current Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Other Liabilities Disclosure [Abstract]      
Customer incentives $ 5,778   $ 7,516
Accrued interest 690   347
Other 7,053   5,129
Total other current liabilities $ 13,521 $ 12,992 $ 12,992