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Leases - Narrative (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Lessee, Lease, Description [Line Items]    
Operating lease assets $ 21,255  
Operating lease liabilities 27,145  
Finance lease ROU assets 7,406  
Finance lease liabilities $ 7,447  
Accounting Standards Update 2016-02    
Lessee, Lease, Description [Line Items]    
Operating lease assets   $ 31,100
Operating lease liabilities   37,100
Finance lease ROU assets   6,000
Finance lease liabilities   $ 6,000