Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Income and Expenses [Abstract]
Accrual for loss related to legal proceedings (Footnote 8)	$ 0	$ (5,000)
Other expense, net	(791)	(68)
Total other expense, net	$ (791)	$ (5,068)