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Leases - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Jan. 01, 2019
Operating Leased Assets [Line Items]      
Variable lease, payment $ 19,317 $ 57,687  
Accounting Standards Update 2016-02      
Operating Leased Assets [Line Items]      
Operating lease, right-of-use asset     $ 4,507
Operating lease, liability     $ 4,507