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Leases - Balance Sheet Information (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Assets    
Operating lease assets $ 62,418 $ 76,548
Liabilities    
Current operating lease liabilities 18,374 20,345
Noncurrent operating lease liabilities 58,782 69,531
Total operating lease liabilities $ 77,156 $ 89,876
Current operating lease liabilities us-gaap:OtherLiabilitiesCurrent