Deferred Charges, Goodwill and Other Assets (Summary Of Notional Amount And Fair Value Of Derivative Financial Instruments) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Fair Value	$ 32,000			$ 95,000
Interest and other investment income (loss)	267,000		386,000
Gain (Loss) on Derivative Instruments [Member]
Derivatives, Fair Value [Line Items]
Interest and other investment income (loss)	(63,000)
LIBOR Cap One [Member]
Derivatives, Fair Value [Line Items]
Notional Value	51,000,000	[1]
Strike Rate	1.50%
Effective Date	Sep. 01, 2014
Expiration Date	Oct. 01, 2015
Fair Value	1,000			1,000
LIBOR Cap Two [Member]
Derivatives, Fair Value [Line Items]
Notional Value	24,000,000	[1]
Strike Rate	1.50%
Effective Date	Sep. 01, 2014
Expiration Date	Oct. 01, 2015
Fair Value	1,000			1,000
LIBOR Cap Three [Member]
Derivatives, Fair Value [Line Items]
Notional Value	51,000,000	[1]
Strike Rate	1.75%
Effective Date	Oct. 01, 2015
Expiration Date	Oct. 01, 2016
Fair Value	20,000			64,000
LIBOR Cap Four [Member]
Derivatives, Fair Value [Line Items]
Notional Value	24,000,000	[1]
Strike Rate	1.75%
Effective Date	Oct. 01, 2015
Expiration Date	Oct. 01, 2016
Fair Value	$ 10,000			$ 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.