Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Significant Changes in Our Contract Liabilities (Detail)

v3.20.1
Revenue Recognition - Significant Changes in Our Contract Liabilities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Change in Contract with Customer, Liability [Abstract]    
Short Term, Balance, beginning of period $ 11,537  
Short Term, Revenue recognized during the period that was included in the beginning balance of contract liabilities (8,156)  
Short Term, Additional amounts recognized during the period 19,341  
Short Term, Revenue recognized during the period that was recorded during the period (13,528)  
Short Term, Transfers 299  
Short Term, Balance, end of period 9,493  
Short Term, Amount refundable 9,403 $ 11,410
Long-Term, Balance, beginning of period 1,379  
Long-Term, Additional amounts recognized during the period 664  
Long-Term, Transfers (299)  
Long-Term, Balance, end of period 1,744  
Long-Term, Amount refundable $ 1,744 $ 1,379