Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Income and Expenses [Abstract]
Accrual for loss related to legal proceedings	$ 0	$ 0	$ 0	$ (5,000)
Other income (expense), net	91	722	(616)	846
Total other expense, net	$ 91	$ 722	$ (616)	$ (4,154)