Restructuring - Summary of Restructuring Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost And Reserve [Line Items]
Beginning balance	$ 30	$ 1,188
Charges to expense	865	119	$ 7,553
Cash payments	(895)	(1,261)
Non-cash utilization		(16)
Ending balance		30	1,188
Employee Reduction [Member]
Restructuring Cost And Reserve [Line Items]
Beginning balance	30	1,098
Charges to expense	865	31
Cash payments	$ (895)	(1,099)
Ending balance		30	1,098
Accelerated Depreciation [Member]
Restructuring Cost And Reserve [Line Items]
Charges to expense		16
Non-cash utilization		(16)
Other Exit Costs [Member]
Restructuring Cost And Reserve [Line Items]
Beginning balance		90
Charges to expense		72
Cash payments		$ (162)
Ending balance			$ 90