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Leases - Cash Flow by Lease Type (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Leases    
Operating cash outflows from operating leases $ 3,795 $ 3,609
Operating cash outflows from finance leases 4,035 4,193
Financing cash outflows from finance leases 252  
Operating lease assets obtained in exchange for new operating lease liabilities $ 1,658 $ 6,175