Carrying Amounts and Fair Value of Financial Instruments (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018 USD ($) investment	Dec. 31, 2017 USD ($)
Fair Value Disclosures [Abstract]
Number of equity investments | investment	1
Investor funding period	30 days
Review period to request a new third party appraisal	24 months
Impaired financing receivable, recorded investment	$ 8,790,394	$ 8,442,306
Fair value disclosure, off-balance sheet risks, amount, liability	$ 88,800,000