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Leases - Net Book Value of Operating Lease Property Included in Property and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Leases [Abstract]    
Property leased to lessees $ 113,008 $ 113,008
Accumulation depreciation (13,308) (10,197)
Carrying Value $ 99,700 $ 102,811