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Loans and Investments, Summary of impaired loans (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) loan | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) loan | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) loan
Loans and Investments |  |  |  |  |
Unpaid Principal Balance | $ 195,085,030 |  | $ 195,085,030 |  | $ 197,640,645
Carrying Value | 184,540,050 |  | 184,540,050 |  | 187,351,035
Allowance for Loan Losses | 83,255,922 |  | 83,255,922 |  | $ 83,711,575
Average Recorded Investment | 195,087,280 | $ 196,686,516 | 196,362,838 | $ 197,769,065 |
Interest Income Recognized | $ 27,728 | 338,080 | $ 472,005 | 1,061,364 |
Number of impaired loans | loan | 6 |  | 6 |  | 8
Land |  |  |  |  |
Loans and Investments |  |  |  |  |
Unpaid Principal Balance | $ 131,085,948 |  | $ 131,085,948 |  | $ 131,085,948
Carrying Value | 125,325,106 |  | 125,325,106 |  | 125,925,677
Allowance for Loan Losses | 53,883,478 |  | 53,883,478 |  | 53,883,478
Average Recorded Investment | 131,085,948 | 130,012,569 | 131,085,948 | 128,740,618 |
Hotel |  |  |  |  |
Loans and Investments |  |  |  |  |
Unpaid Principal Balance | 34,750,000 |  | 34,750,000 |  | 34,750,000
Carrying Value | 34,750,000 |  | 34,750,000 |  | 34,496,296
Allowance for Loan Losses | 5,700,000 |  | 5,700,000 |  | 3,700,000
Average Recorded Investment | 34,750,000 | 34,750,000 | 34,750,000 | 34,750,000 |
Interest Income Recognized |  | 291,542 | 370,877 | 857,459 |
Office |  |  |  |  |
Loans and Investments |  |  |  |  |
Unpaid Principal Balance | 27,549,082 |  | 27,549,082 |  | 27,562,582
Carrying Value | 22,764,944 |  | 22,764,944 |  | 22,778,444
Allowance for Loan Losses | 21,972,444 |  | 21,972,444 |  | 21,972,444
Average Recorded Investment | 27,551,332 | 27,569,332 | 27,555,832 | 27,573,832 |
Interest Income Recognized | 27,728 | 23,601 | 79,065 | 69,763 |
Commercial |  |  |  |  |
Loans and Investments |  |  |  |  |
Unpaid Principal Balance | 1,700,000 |  | 1,700,000 |  | 1,700,000
Carrying Value | 1,700,000 |  | 1,700,000 |  | 1,700,000
Allowance for Loan Losses | 1,700,000 |  | 1,700,000 |  | 1,700,000
Average Recorded Investment | $ 1,700,000 | 1,700,000 | 1,700,000 | 1,700,000 |
Multifamily |  |  |  |  |
Loans and Investments |  |  |  |  |
Unpaid Principal Balance |  |  |  |  | 2,542,115
Carrying Value |  |  |  |  | 2,450,618
Allowance for Loan Losses |  |  |  |  | $ 2,455,653
Average Recorded Investment |  | 2,654,615 | 1,271,058 | 5,004,615 |
Interest Income Recognized |  | $ 22,937 | $ 22,063 | $ 134,142 |

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