Restructuring Costs - Changes in Restructuring Balance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning balance			$ 0
Additional accruals	$ 292	$ 0	292	$ 0
Cash payments			0
Non-cash settlements			(34)
Accrued restructuring, ending balance	258		258
Employee Severance and Benefits
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning balance			0
Additional accruals			258
Cash payments			0
Non-cash settlements			0
Accrued restructuring, ending balance	258		258
Asset Impairments
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning balance			0
Additional accruals	34		34
Cash payments			0
Non-cash settlements			(34)
Accrued restructuring, ending balance	$ 0		$ 0