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Leases - Narrative and Lease Balances (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Operating lease liabilities $ 61,168   $ 0
Operating lease right-of-use assets $ 82,976   $ 0
ASU 2016-02      
Lessee, Lease, Description [Line Items]      
Operating lease liabilities   $ 60,600  
Operating lease right-of-use assets   82,500  
Reclassified intangible assets   $ 22,300  
Minimum      
Lessee, Lease, Description [Line Items]      
Lease renewal term 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Lease renewal term 50 years