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Rental Activity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property Subject to or Available for Operating Lease [Line Items]      
Depreciation $ 23,143 $ 21,954 $ 21,191
Operating Leases, Future Minimum Payments Receivable [Abstract]      
2020 25,924    
2021 18,489    
2022 16,310    
2023 12,507    
2024 9,788    
Thereafter 2,366    
Total $ 85,384    
Minimum      
Property Subject to or Available for Operating Lease [Line Items]      
Rental arrangements, original term 6 months    
Maximum      
Property Subject to or Available for Operating Lease [Line Items]      
Rental arrangements, original term 60 months