Quarterly report pursuant to Section 13 or 15(d)

Leases - Right-of-Use Lease Assets and Lease Liabilities (Details)

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Leases - Right-of-Use Lease Assets and Lease Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Assets    
Operating lease assets $ 54,238 $ 0
Finance lease assets 1,582  
Total leased assets 55,820  
Current:    
Operating lease liabilities 14,095 0
Finance lease liabilities 176  
Noncurrent:    
Operating lease liabilities 38,473 $ 0
Finance lease liabilities 364  
Total lease liabilities $ 53,108  
Finance lease assets, balance sheet line item us-gaap:PropertyPlantAndEquipmentNet  
Finance lease liabilities, current, balance sheet line item us-gaap:AccruedLiabilitiesCurrent  
Finance lease liabilities, noncurrent, balance sheet line item us-gaap:OtherLiabilitiesNoncurrent