Derivative Financial Instruments (Details Textual) (Cash Flow Hedging [Member], Interest Rate Contract [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Financial Instruments (Textual) [Abstract]
Interest rate hedges designated and qualifying as a cash flow hedge	$ 42,000	$ (29,000)