Subsequent Event (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011
Line of Credit Facility, Maximum Borrowing Capacity	$ 50,000,000	$ 50,000,000
Line of Credit Facility, Expiration Date		5
Debt Instrument, Restrictive Covenants		20000000
Debt Issuance Cost	200,000	(250,000)	0
Line of Credit Facility, Amount Outstanding	$ 0	$ 0
LIBOR Rate [Member] | Maximum [Member]
Line of Credit Facility, Interest Rate Description		0.0225
LIBOR Rate [Member] | Minimum [Member]
Line of Credit Facility, Interest Rate Description		0.015
Federal Funds Rate [Member] | Maximum [Member]
Line of Credit Facility, Interest Rate Description		0.0225
Federal Funds Rate [Member] | Minimum [Member]
Line of Credit Facility, Interest Rate Description		0.015