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Restructuring - Summary of Restructuring Liability (Detail)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
USD ($)
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2016 $ 1,043
Costs Incurred 5,698
Payments (3,743)
Non-cash (78)
Balance at September 30, 2017 2,920
Cumulative Costs Incurred to Date 10,694
2015 Initiatives | Employee Severance Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2016 455
Costs Incurred 0
Payments (410)
Non-cash 0
Balance at September 30, 2017 45
Cumulative Costs Incurred to Date 4,130
2015 Initiatives | Facility Exit Related Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2016 588
Costs Incurred 827
Payments (355)
Non-cash 0
Balance at September 30, 2017 1,060
Cumulative Costs Incurred to Date 1,693
2017 Initiatives | Employee Severance Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2016 0
Costs Incurred 2,946
Payments (2,574)
Non-cash 0
Balance at September 30, 2017 372
Cumulative Costs Incurred to Date 2,946
2017 Initiatives | Facility Exit Related Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2016 0
Costs Incurred 1,270
Payments (108)
Non-cash 91
Balance at September 30, 2017 1,253
Cumulative Costs Incurred to Date 1,270
2017 Initiatives | Other Related Costs  
Restructuring Reserve [Roll Forward]  
Balance at December 31, 2016 0
Costs Incurred 655
Payments (296)
Non-cash (169)
Balance at September 30, 2017 190
Cumulative Costs Incurred to Date $ 655