Derivative Financial Instruments (Location And Effect Of The Derivative Instrument On The Statements Of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	$ (1,674)	$ (2,722)	$ (3,846)
Hedged Item Debt [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	(3,980)	(790)	7,208
Interest Rate Swap [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	$ 2,306	$ (1,932)	$ (11,054)