Annual report pursuant to Section 13 and 15(d)

Restructuring Charges - Additional Information (Details)

v3.3.1.900
Restructuring Charges - Additional Information (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Oct. 20, 2015
Employee
Sep. 29, 2015
Employee
Aug. 21, 2015
Employee
Jan. 05, 2012
Position
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Restructuring Cost And Reserve [Line Items]                    
Restructuring charges         $ 1,138 $ 2,561 $ 84 $ 3,699 $ 84 $ 328
Total expenses on restructuring activities               3,700    
Payments for restructuring expenses               3,200    
Expected future payments for restructuring         $ 500     500    
Contract Termination Costs [Member]                    
Restructuring Cost And Reserve [Line Items]                    
Restructuring charges               766    
Facility Costs [Member]                    
Restructuring Cost And Reserve [Line Items]                    
Restructuring charges [1]                 84  
2015 Restructuring [Member]                    
Restructuring Cost And Reserve [Line Items]                    
Number of employees terminated | Employee 9 5 38              
2015 Restructuring [Member] | Severance, Other Termination Benefits and Outplacement Services [Member]                    
Restructuring Cost And Reserve [Line Items]                    
Restructuring charges               2,900    
2015 Restructuring [Member] | Contract Termination Costs [Member]                    
Restructuring Cost And Reserve [Line Items]                    
Restructuring charges               800    
2012 Restructuring [Member]                    
Restructuring Cost And Reserve [Line Items]                    
Number of positions eliminated | Position       84            
Number of positions eliminated (in hundredths)       34.00%            
2012 Restructuring [Member] | Facility Costs [Member]                    
Restructuring Cost And Reserve [Line Items]                    
Restructuring charges               $ 0 $ 100 $ 300
[1] Includes moving and relocation costs, and lease payments, net of sublease payments.