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Leases - Lessee Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Jan. 01, 2019
Mar. 31, 2019
Mar. 31, 2018
Lessee, Lease, Description [Line Items]      
Lessee, operating lease, renewal term   15 years  
Operating cash flows from operating leases   $ 1,400  
Operating lease right-of-use-assets, net   $ 22,469  
Operating leases, rent expense     $ 1,400
Minimum      
Lessee, Lease, Description [Line Items]      
Lessee, operating lease, remaining lease term   2 months  
Lessee, operating lease, term   1 year  
Maximum      
Lessee, Lease, Description [Line Items]      
Lessee, operating lease, remaining lease term   8 years  
Lessee, operating lease, term   5 years  
Accounting Standards Update 2016-02      
Lessee, Lease, Description [Line Items]      
Operating lease right-of-use-assets, net $ 23,800    
Accrued rent 1,100    
Right-of-use assets acquired through lease obligations $ 24,900