Derivative Instruments and Hedging Activities (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Interest Rate Cap One [Member]
Derivatives, Fair Value [Line Items]
Derivative, Maturity Date	Jul. 22, 2015
Derivative, Cap Interest Rate	2.50%
Interest Rate Cap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Maturity Date	Jan. 22, 2015
Derivative Liability, Notional Amount	200
Derivative, Cap Interest Rate	2.50%