Fair Value Measurements and Derivative Instruments Reporting (Fair Value And Basis Of Valuation Of Financial Liabilities) (Details) - Interest Rate Swap Asset [Member] - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities	[1]
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities	[1]	169	275
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities	[1]

[1] See "Derivative Instruments Reporting" below for detailed information regarding the Company's interest rate swap agreements.