Notes Payable (Bank Of America Revolver) (Narrative) (Details) (USD $)			12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 US GE Capital Term Loan [Member]	Oct. 31, 2012 US GE Capital Term Loan [Member]	Dec. 31, 2012 US Bank Of America Revolver [Member]	Dec. 31, 2012 Minimum [Member] US Bank Of America Revolver [Member]	Dec. 31, 2012 Maximum [Member] US Bank Of America Revolver [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 27,700,000	$ 30,000,000
Spread over LIBOR						2.50%	3.00%
Maturity date			Oct. 31, 2012		Oct. 31, 2017
Interest rate swap	5,855,000	4,722,000			29,100,000
Annual decrease in maximum borrowing capacity					3,000,000
Balloon payment					18,000,000
Amount of financing required for equipment lease					$ 15,500,000