Quarterly report pursuant to Section 13 or 15(d)

Operating and Finance Lease Right-of-Use Assets - Supplemental Balance Sheet Information Related to Leases (Detail)

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Operating and Finance Lease Right-of-Use Assets - Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
Lessee, Lease, Description [Line Items]    
Operating leases ROU assets $ 63,120 $ 65,000
Operating lease liabilities (current) 9,464  
Operating lease liabilities (noncurrent) 61,847  
Total operating lease liabilities $ 71,311 $ 74,400
Weighted Average Remaining Lease Term, Operating leases 8 years 8 months 12 days  
Weighted Average Remaining Lease Term, Finance leases 3 years 9 months 18 days  
Weighted Average Discount Rate, Operating leases 8.05%  
Weighted Average Discount Rate, Finance leases 4.28%  
Related Party Lease [Member]    
Lessee, Lease, Description [Line Items]    
Operating leases ROU assets $ 9,163  
Operating lease liabilities (current) 903  
Operating lease liabilities (noncurrent) 8,633  
Total operating lease liabilities 9,536  
Other Operating Leases [Member]    
Lessee, Lease, Description [Line Items]    
Operating leases ROU assets 53,957  
Operating lease liabilities (current) 8,561  
Operating lease liabilities (noncurrent) 53,214  
Total operating lease liabilities $ 61,775