Restructuring and Other Charges - Restructuring Reserve Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 1,215		$ 1,257	$ 800
Business Combination, Integration Related Costs	20	$ 147	213	$ 147
Balance accrued as of December 31, 2013			1,437
Restructuring Charges			1,371
Restructuring Reserve, Accrual Adjustment			(114)
Expenditures			(1,452)
Balance accrued as of September 30, 2014	1,242		1,242
Severance, Payroll Taxes and Other Employee Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Balance accrued as of December 31, 2013			1,347
Restructuring Charges			1,371
Restructuring Reserve, Accrual Adjustment			(114)
Expenditures			(1,392)
Balance accrued as of September 30, 2014	1,212		1,212
Lease Abandonment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance accrued as of December 31, 2013			90
Restructuring Charges			0
Restructuring Reserve, Accrual Adjustment			0
Expenditures			(60)
Balance accrued as of September 30, 2014	$ 30		$ 30