Term Loan Agreements and Long-Term Debt - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	May 22, 2018	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Repayment of long-term obligations	$ 22,599	$ 22,513	$ 21
Exit and/or prepayment fees paid	1,470
Unamortized deferred financing costs	473
Revolving Loan Agreement
Debt Instrument [Line Items]
Repayment of long-term obligations	2,958
Exit and/or prepayment fees paid	$ 236