v3.2.0.727
Stock-Based Compensation (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2015
Sep. 30, 2014
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Performance-Based Restricted Stock Units Granted in 2015 [Domain]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period       700,000  
Performance-Based Options Granted in 2015 [Domain]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       300,000  
Performance-Based Restricted Stock Units Granted in 2013 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Additional stock-based compensation that would have been recorded if operating income targets had been deemed probable         $ 4.2
Performance Based Restricted Stock Units Granted In 2014 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated Share-based Compensation Expense, Cumulative Adjustment   $ 3.8      
Additional stock-based compensation that would have been recorded if operating income targets had been deemed probable       $ 4.3  
Performance Based Restricted Stock Units Granted In 2012 & 2013 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated Share-based Compensation Expense, Cumulative Adjustment     $ 6.6    
Performance Based Restricted Stock Units [Member] | Stock Vesting On February Two Thousand Sixteen [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Annual Vesting Percentage       33.33%  
Performance Based Restricted Stock Units [Member] | Stock Vesting In February Two Thousand Eighteen [Domain]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Annual Vesting Percentage       33.33%  
Performance Based Restricted Stock Units [Member] | Stock Vesting In February Two Thousand Nineteen [Domain]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Annual Vesting Percentage       33.33%  
MyFitnessPal [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 289,700