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Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 30, 2019
Jan. 29, 2019
Jan. 15, 2019
May 29, 2018
Feb. 07, 2018
Nov. 27, 2017
Jul. 24, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Other Commitments [Line Items]                    
Total rent expense               $ 16,500 $ 13,800 $ 9,900
Minimum purchase amount commitment       $ 425,900   $ 305,200        
Loan repayment from equity investee               30,000 6,000 0
Long-term Purchase Commitment, Period       5 years   4 years        
Payments to Acquire Property, Plant, and Equipment               $ 223,312 $ 195,695 $ 70,576
SDC                    
Other Commitments [Line Items]                    
Loans and Leases Receivable, Commitments, Fixed Rates             $ 30,000      
Loan repayment from equity investee         $ 30,000          
SDC                    
Other Commitments [Line Items]                    
Loan repayment from equity investee         $ 30,000          
Subsequent Event                    
Other Commitments [Line Items]                    
Payments to Acquire Property, Plant, and Equipment     $ 27,000              
Purchase And Sale Agreement, Purchase Price   $ 58,100                
Purchase And Sale Agreement, Cash Paid $ 2,000                  
Purchase And Sale Agreement, Cash To Be Paid $ 56,100