Notes Payable and Long-Term Debt (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 19, 2009	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Jan. 31, 2012	May 26, 2010	Sep. 30, 2012 Interest Rate Swap [Member]	Sep. 30, 2012 Cash Flow Hedging [Member]	Sep. 30, 2012 Promissory Notes [Member]	Jul. 31, 2012 Promissory Notes [Member]	Sep. 30, 2012 Line of Credit [Member]
Debt Instrument [Line Items]
Notional amount of interest rate	$ 3,000,000							$ 9,000,000
Description of variable rate basis	three-month LIBOR
Long-term debt, basis spread on variable rate	3.40%
Interest rate, stated percentage	7.02%											1.00%	4.50%
Amount outstanding		125,000		125,000		485,000					10,500,000
Long-term debt		24,906,000		24,906,000		12,372,000
Derivative, fixed interest rate								8.49%
Cash flow hedge, liability at fair value									497,000	1,061,000
Cash flow hedge, derivative instrument liabilities at fair value		1,558,000		1,558,000		1,196,000
Unrealized loss on interest rate swap		(80,000)	(536,000)	(239,000)	(591,000)	640,000
Available-for-sale securities pledged as collateral		1,566,000		1,566,000		877,000
Collateral already posted, aggregate fair value						310,000
Line of credit facility, maximum borrowing capacity		4,000,000		4,000,000			700,000					13,000,000
Line of credit facility, interest rate		5.00%		5.00%
Short-term notes payable		$ 125,000		$ 125,000		$ 485,000