Restructuring Charges - Roll-Forward of Accrued Restructuring Expense (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Restructuring Reserve [Roll Forward]
Accrued at January 1, 2016	$ 1,062
Payments	(73)
Accelerated depreciation	0
Accrued at March 31, 2016	989
Write-downs and retirements of fixed assets
Restructuring Reserve [Roll Forward]
Accrued at January 1, 2016	228
Payments	0
Accelerated depreciation	0
Accrued at March 31, 2016	228
Lease cancellations
Restructuring Reserve [Roll Forward]
Accrued at January 1, 2016	834
Payments	(73)
Accelerated depreciation	0
Accrued at March 31, 2016	$ 761