Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 0	$ 0	$ 2,988	$ 0
Restructuring liability	1,515		1,515
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs			1,745
Restructuring liability	569		569
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs			1,243
Restructuring liability	946		946
Accrued Expenses And Other Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring liability	$ 1,500		$ 1,500