Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Detail)

v3.8.0.1
Significant Accounting Policies - Additional Information (Detail)
 1 Months Ended 3 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Segment
Product
Mar. 31, 2017
USD ($)
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
Subsidiary or Equity Method Investee [Line Items]          
Credit card receivables $ 80,700,000 $ 80,700,000     $ 68,100,000
Bad-debt expense   100,000 $ 200,000    
Allowance for doubtful accounts 1,200,000 1,200,000     $ 1,200,000
Allowances for product returns   $ 4,200,000 3,900,000    
Number of geographic regions | Segment   6      
Number of product categories | Product   5      
Other operating income   $ 16,200,000      
Other expense, net   (24,400,000) 0    
Dutch Auction Tender Offer [Member]          
Subsidiary or Equity Method Investee [Line Items]          
Loss recognized in other expense   11,300,000      
Convertible Senior Notes Due 2019 [Member] | Repurchase of 2019 Convertible Notes [Member]          
Subsidiary or Equity Method Investee [Line Items]          
Loss on extinguishment of debt 13,100,000 13,100,000      
Repurchase of convertible notes $ 475,000,000 475,000,000      
China [Member]          
Subsidiary or Equity Method Investee [Line Items]          
Other operating income   16,200,000 $ 0    
Accounting Standards Update 2014-09 [Member]          
Subsidiary or Equity Method Investee [Line Items]          
Net reduction of retained earnings due to cumulative impact       $ 2,300,000  
Other operating income   16,200,000      
Other expense, net   $ (24,400,000)