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Fair Value Measurements (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Term deposits $ 16 $ 16
Interest rate swaps 0 675
Total assets 16 691
Interest rate swaps 506 0
Total liabilities 506 0
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Term deposits 16 16
Interest rate swaps 0 0
Total assets 16 16
Interest rate swaps 0 0
Total liabilities 0 0
Significant Other Observable Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Term deposits 0 0
Interest rate swaps 0 675
Total assets 0 675
Interest rate swaps 506 0
Total liabilities 506 0
Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Term deposits 0 0
Interest rate swaps 0 0
Total assets 0 0
Interest rate swaps 0 0
Total liabilities $ 0 $ 0