Derivatives (Gain Loss on Interest Rate Swaps Included in Earnings) (Details) (Fair Value Hedging [Member], USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Related long-term debt	$ 134,000	$ 406,000
Net impact on Condensed Consolidated Statements of Operations	(222,000)	419,000
Designated as Hedging Instrument [Member] | Interest rate agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swap	(356,000)	13,000
New Rate Agreement [Member] | Senior Secured Notes [Member] | Interest rate agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 45,000,000