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Leases - Schedule of Company's right-of-use lease assets and lease liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Jan. 01, 2019
Assets:    
Total lease assets $ 93,358 $ 100,000
Liabilities:    
Operating lease liabilities - current 27,125  
Operating lease liabilities - long-term 66,881  
Total lease liabilities 94,006 $ 100,000
Current operating lease liabilities [Member]    
Liabilities:    
Operating lease liabilities - current 27,125  
Long-term operating lease liabilities [Member]    
Liabilities:    
Operating lease liabilities - long-term 66,881  
Property Operating lease assets [Member]    
Assets:    
Total lease assets 64,206  
Automobile Operating lease assets [Member]    
Assets:    
Total lease assets 27,197  
Equipment operating lease assets [Member]    
Assets:    
Total lease assets $ 1,955