Derivative Financial Instruments (Schedule of Gains and Losses Related to Derivative Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative [Line Items]
Gain or (Loss) on Derivatives  Recognized in OCI	$ 598	$ 341	$ 1,208	$ (1,656)
Cash Flow Hedging | Interest expense
Derivative [Line Items]
Gain or (Loss) Reclassified  from Accumulated OCI  into Earnings	619	517	1,225	754
Cash Flow Hedging | Interest rate swap contracts
Derivative [Line Items]
Gain or (Loss) on Derivatives  Recognized in OCI	$ (21)	$ (176)	$ (17)	$ (2,410)