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Commitments, contingencies and guarantees - Narrative (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2016
Jun. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Long-term Purchase Commitment [Line Items]          
Product warranty accrual, current     $ 8,858,000   $ 10,400,000
Product warranty accrual, noncurrent     500,000    
Other commitment     53,700,000   23,800,000
Other commitments, remainder of 2016     2,800,000    
Other commitment, due in 2017     17,900,000    
Other commitment, due in 2018     17,600,000    
Other commitment, due in 2019     15,400,000    
Red Bull [Member]          
Long-term Purchase Commitment [Line Items]          
Agreement term 3 years 6 months        
Facilities Lease [Member]          
Long-term Purchase Commitment [Line Items]          
Future minimum payments due         $ 152,200,000
Future minimum sublease rentals   $ 5,000,000      
Rent expense     $ 14,400,000 $ 8,200,000  
Restricted Stock [Member] | Common Class A [Member] | Red Bull [Member]          
Long-term Purchase Commitment [Line Items]          
Restricted stock issued during period (shares)   $ 7,300,000.0