Restructuring - Additional Information (Detail) - February 2015 Restructuring Plan $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | |
---|---|---|---|---|
Feb. 17, 2015
Employee
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Dec. 31, 2014
Employee
|
|
Restructuring Cost and Reserve [Line Items] | ||||
Reduction of market leader head count | Employee | 350 | 80 | ||
Restructuring charge | $ 3.4 | $ 35.1 | ||
Restructuring reserves | 0.2 | 0.2 | ||
Contract Termination Costs | ||||
Restructuring Cost and Reserve [Line Items] | ||||
Restructuring charge | 7.7 | |||
Contract Termination Costs | Bellevue, Washington | ||||
Restructuring Cost and Reserve [Line Items] | ||||
Restructuring charge | 2.2 | |||
Employee Severance | ||||
Restructuring Cost and Reserve [Line Items] | ||||
Restructuring charge | 12.1 | |||
Noncash Expenses Relating to Employee Benefit | ||||
Restructuring Cost and Reserve [Line Items] | ||||
Restructuring charge | $ 1.1 | 15.1 | ||
Leasehold improvements | Contract Termination Costs | ||||
Restructuring Cost and Reserve [Line Items] | ||||
Restructuring costs for contract termination costs | $ 4.0 |