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Restructuring - Summary of Restructuring Liability (Detail)
$ in Thousands
 9 Months Ended
Sep. 30, 2015
USD ($)
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2014 $ 1,983
Costs Incurred 789
Payments (2,312)
Balance at September 30, 2015 460
Cumulative Costs Incurred to Date 12,277
Total Expected Restructuring Costs 12,413
2013 Initiatives | Employee Severance Costs/ Employment Contract Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2014 0
Costs Incurred 0
Payments 0
Balance at September 30, 2015 0
Cumulative Costs Incurred to Date 3,986
Total Expected Restructuring Costs 3,986
2013 Initiatives | Facility Exit Related Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2014 232
Costs Incurred (3)
Payments (141)
Balance at September 30, 2015 88
Cumulative Costs Incurred to Date 2,622
Total Expected Restructuring Costs 2,630
2014 Initiatives | Employee Severance Costs/ Employment Contract Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2014 1,751
Costs Incurred (151)
Payments (1,600)
Balance at September 30, 2015 0
Cumulative Costs Incurred to Date 3,428
Total Expected Restructuring Costs 3,428
2014 Initiatives | Share-based Compensation Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2014 0
Costs Incurred 0
Payments 0
Balance at September 30, 2015 0
Cumulative Costs Incurred to Date 1,298
Total Expected Restructuring Costs 1,298
2015 Initiative | Employee Severance Costs/ Employment Contract Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2014 0
Costs Incurred 571
Payments (571)
Balance at September 30, 2015 0
Cumulative Costs Incurred to Date 571
Total Expected Restructuring Costs 571
2015 Initiative | Facility Exit Related Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2014 0
Costs Incurred 372
Payments 0
Balance at September 30, 2015 372
Cumulative Costs Incurred to Date 372
Total Expected Restructuring Costs $ 500