Restructuring, Impairment and Other Charges - Additional Information (Details) $ in Millions |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2016
USD ($)
Employee
|
Dec. 31, 2015
USD ($)
Employee
|
Dec. 31, 2014
USD ($)
Employee
|
|
| Restructuring Cost And Reserve [Line Items] | ||||
| Employee termination costs | $ 3.7 | $ 2.3 | $ 0.7 | |
| Number of employees used to determine employee termination costs | Employee | 84 | 64 | 9 | |
| Other restructuring charges | $ 1.5 | $ 1.9 | $ 2.1 | |
| Finite-lived intangible assets | 54.3 | 69.3 | ||
| International | ||||
| Restructuring Cost And Reserve [Line Items] | ||||
| Employee termination costs | 0.6 | 0.9 | 0.6 | |
| Other restructuring charges | $ 0.0 | $ 0.0 | 0.0 | |
| International | Customer Relationship Intangible Assets | ||||
| Restructuring Cost And Reserve [Line Items] | ||||
| Impairment of intangible assets | $ 1.7 | |||
| Finite-lived intangible assets | $ 16.5 | $ 16.5 | ||