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Leases - Narratives (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Lessee, Lease, Description      
Operating lease right of use assets $ 13,234    
Lease liability current 3,131    
Operating lease liability, noncurrent $ 10,103   $ 0
Lease renewal term 12 years    
Lease termination period 1 year    
Operating lease, weighted average lease term 6 years    
Operating lease, weighted average discount rate (percent) 5.00%    
Finance lease, weighted average lease term 2 years    
Finance lease, weighted average discount rate (percent) 4.30%    
Minimum      
Lessee, Lease, Description      
Lease term 1 year    
Maximum      
Lessee, Lease, Description      
Lease term 12 years    
ASU 2016-02      
Lessee, Lease, Description      
Operating lease right of use assets   $ 13,585  
Lease liability current   3,322  
Operating lease liability, noncurrent   $ 10,263