Deferred Charges, Goodwill and Other Assets, Net (Summary Of Notional Amount And Fair Value Of Derivative Financial Instruments) (Details) - USD ($)		3 Months Ended	6 Months Ended
		Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Fair Value		$ 15,000	$ 15,000	$ 95,000
Interest and other investment income (loss)		(17,000)	(80,000)
LIBOR Cap One [Member]
Derivatives, Fair Value [Line Items]
Notional Value	[1]	$ 51,000,000	$ 51,000,000
Strike Rate		1.50%	1.50%
Effective Date			Sep. 01, 2014
Expiration Date			Oct. 01, 2015
Fair Value				1,000
LIBOR Cap Two [Member]
Derivatives, Fair Value [Line Items]
Notional Value	[1]	$ 24,000,000	$ 24,000,000
Strike Rate		1.50%	1.50%
Effective Date			Sep. 01, 2014
Expiration Date			Oct. 01, 2015
Fair Value				1,000
LIBOR Cap Three [Member]
Derivatives, Fair Value [Line Items]
Notional Value	[1]	$ 51,000,000	$ 51,000,000
Strike Rate		1.75%	1.75%
Effective Date			Oct. 01, 2015
Expiration Date			Oct. 01, 2016
Fair Value		$ 10,000	$ 10,000	64,000
LIBOR Cap Four [Member]
Derivatives, Fair Value [Line Items]
Notional Value	[1]	$ 24,000,000	$ 24,000,000
Strike Rate		1.75%	1.75%
Effective Date			Oct. 01, 2015
Expiration Date			Oct. 01, 2016
Fair Value		$ 5,000	$ 5,000	$ 29,000

[1] The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks.