Fair Value of Financial Instruments (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Long-term Debt	$ 280,400,000		$ 280,400,000		$ 264,000,000
Long-term Debt, Fair Value	290,600,000		290,600,000		275,400,000
Number of Interest Rate Derivatives Held	3		3
Number of variable rate mortgage loans with interest rate swap agreements	2		2
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	(482,000)		(482,000)		(800,000)
Derivative, Gain (Loss) on Derivative, Net	$ (100,000)	$ (100,000)	$ 300,000	$ (100,000)