Revenues - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Nov. 01, 2018	Jan. 01, 2018
Disaggregation of Revenue [Line Items]
Cumulative effect of new accounting principle in period of adoption		$ (268)
Retained Earnings
Disaggregation of Revenue [Line Items]
Cumulative effect of new accounting principle in period of adoption		$ (268)
Accounting Standards Update 2014-09 | Retained Earnings
Disaggregation of Revenue [Line Items]
Cumulative effect of new accounting principle in period of adoption			$ 300
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Disaggregation of Revenue [Line Items]
Contract with customer, liability, cumulative catch-up adjustment to revenue, modification of contract	$ 1,800