Restructuring - Summary of Restructuring Activity (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Restructuring Cost And Reserve [Line Items]
Charges to expense	$ 5,059
Cash payments	(1,019)
Non-cash utilization	(1,929)
Balance at June 30, 2017	2,111
Employee Reduction [Member]
Restructuring Cost And Reserve [Line Items]
Charges to expense	1,688
Cash payments	(48)
Balance at June 30, 2017	1,640
Accelerated Depreciation [Member]
Restructuring Cost And Reserve [Line Items]
Charges to expense	1,929
Non-cash utilization	(1,929)
Other Exit Costs [Member]
Restructuring Cost And Reserve [Line Items]
Charges to expense	1,442
Cash payments	(971)
Balance at June 30, 2017	$ 471