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Leases - Lessee Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Jan. 01, 2019
Lessee, Lease, Description [Line Items]          
Lessee, operating lease, renewal term 15 years   15 years    
Operating lease right-of-use-assets, net $ 20,826   $ 20,826    
Operating lease liabilities 22,002   22,002    
Lessee, operating lease, lease not yet commenced, commitment amount 2,700   2,700    
Operating cash flows from operating leases $ 1,400   $ 4,200    
Operating leases, rent expense   $ 1,400   $ 4,300  
Minimum          
Lessee, Lease, Description [Line Items]          
Lessee, operating lease, remaining lease term     2 months    
Lessee, operating lease, term 1 year   1 year    
Maximum          
Lessee, Lease, Description [Line Items]          
Lessee, operating lease, remaining lease term     8 years    
Lessee, operating lease, term 5 years   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
Operating lease liabilities         $ 24,900