Carrying Amounts and Fair Value of Financial Instruments (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 investment	Dec. 31, 2012	Sep. 30, 2012
Fair Value Disclosures [Abstract]
Number of equity investments	2
Investor funding period	30 days
Review period to request a new third party appraisal	24 months
Impaired financing receivable, recorded investment	$ 33,701,023	$ 39,946,538	$ 4,100,000
Fair value disclosure, off-balance sheet risks, amount, liability	$ 33,000,000