Fair Value of Financial Instruments (Details Textual) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2011	Nov. 15, 2011 Interest Rate Cap [Member]	Mar. 09, 2011 Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, notional amount		$ 220.0	$ 300.0
Loss on derivative	$ 0.3