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Net Investment in Leases (Future Minimum Lease Payments to be Collected Under Sales-Type Leases) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
May 31, 2019
Dec. 31, 2018
Leases [Abstract]      
2020 $ 27,565    
2021 28,062    
2022 30,549    
2023 30,549    
2024 30,549    
Thereafter 894,745    
Total undiscounted cash flows 1,042,019    
Unguaranteed estimated residual value 340,620    
Present value discount (963,724)    
Net investment in leases as of December 31, 2019 $ 418,915 $ 424,100 $ 0