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Loans and Investments (Details) - Subsequent Event Type [Domain] | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) item | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($) item | Mar. 31, 2015 USD ($) | Mar. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Loans and Investments |  |  |  |  |  |  |  |  |
Loans and investments, gross |  | $ 1,595,706,784 |  | $ 1,595,706,784 |  | $ 1,587,429,498 |  |  |
Unearned revenue |  | (9,577,179) |  | (9,577,179) |  | (12,466,528) |  |  |
Allowance for loan losses |  | (117,563,544) | $ (115,059,988) | (117,563,544) | $ (115,059,988) | (115,487,320) | $ (116,470,000) | $ (116,743,412) | $ (122,277,411)
Loans and investments, net |  | $ 1,468,566,061 |  | $ 1,468,566,061 |  | $ 1,459,475,650 |  |  |
Percent of Total |  | 100.00% |  | 100.00% |  | 100.00% |  |  |
Loan Count | item |  |  |  | 146 |  | 139 |  |  |
Wtd. Avg. Pay Rate (as a percent) |  |  |  | 5.65% |  | 5.45% |  |  |
Wtd. Avg. Remaining Months to Maturity |  |  |  | 19 months 12 days |  | 22 months 9 days |  |  |
First Dollar LTV Ratio (as percent) |  | 10.00% |  | 10.00% |  | 13.00% |  |  |
Last Dollar LTV Ratio (as percent) |  | 76.00% |  | 76.00% |  | 76.00% |  |  |
Number of portfolio segments | item |  |  |  | 1 |  |  |  |  |
Other interest income, net |  | $ 7,884,344 |  | $ 7,884,344 |  |  |  |  |
Labor and Related Expense |  | 4,966,138 | $ 3,552,548 | 9,256,344 | $ 6,938,497 |  |  |  |
$87 million warehouse repurchase facility |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Committed line |  |  |  |  |  |  | 87,000,000 |  |
Debt repaid | $ 87,000,000 |  |  |  |  |  |  |  |
Gain | 6,700,000 |  |  |  |  |  |  |  |
Labor and Related Expense | $ 1,200,000 |  |  |  |  |  |  |  |
Higher credit risk |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Loans and investments, gross |  | $ 192,000,000 |  | $ 192,000,000 |  | $ 189,400,000 |  |  |
Last Dollar LTV Ratio (as percent) |  | 95.00% |  | 95.00% |  | 94.00% |  |  |
Credit risk concentration |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Loans and investments, gross |  | $ 1,595,706,784 |  | $ 1,595,706,784 |  | $ 1,587,429,498 |  |  |
Percent of Total |  | 100.00% |  | 100.00% |  | 100.00% |  |  |
First Dollar LTV Ratio (as percent) |  | 10.00% |  | 10.00% |  | 13.00% |  |  |
Last Dollar LTV Ratio (as percent) |  | 76.00% |  | 76.00% |  | 76.00% |  |  |
Credit risk concentration | Minimum |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Credit risk individual ratings | item |  |  |  | 1 |  |  |  |  |
Credit risk concentration | Maximum |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Credit risk individual ratings | item |  |  |  | 5 |  |  |  |  |
Credit risk concentration | Risk rating, three |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Credit risk individual ratings | item |  |  |  | 3 |  |  |  |  |
Credit risk concentration | Risk rating, four |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Credit risk individual ratings | item |  |  |  | 4 |  |  |  |  |
Credit risk concentration | Risk rating, five |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Credit risk individual ratings | item |  |  |  | 5 |  |  |  |  |
Credit risk concentration | Risk rating, 3.5 |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Credit risk individual ratings | item |  |  |  | 3.5 |  |  |  |  |
Credit risk concentration | Risk rating, 4.5 |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Credit risk individual ratings | item |  |  |  | 4.5 |  |  |  |  |
Total assets | Credit risk concentration |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Loan Count | item |  |  |  | 17 |  | 31 |  |  |
Number of different borrowers | item |  |  |  | 5 |  | 5 |  |  |
Concentration risk, percentage |  |  |  | 19.00% |  | 23.00% |  |  |
Bridge Loans |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Loans and investments, gross |  | $ 1,346,226,583 |  | $ 1,346,226,583 |  | $ 1,273,439,238 |  |  |
Percent of Total |  | 84.00% |  | 84.00% |  | 80.00% |  |  |
Loan Count | item |  |  |  | 111 |  | 101 |  |  |
Wtd. Avg. Pay Rate (as a percent) |  |  |  | 5.51% |  | 5.19% |  |  |
Wtd. Avg. Remaining Months to Maturity |  |  |  | 17 months 21 days |  | 19 months 24 days |  |  |
First Dollar LTV Ratio (as percent) |  | 0.00% |  | 0.00% |  | 0.00% |  |  |
Last Dollar LTV Ratio (as percent) |  | 75.00% |  | 75.00% |  | 74.00% |  |  |
Bridge Loans | First mortgage |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Loans and investments, gross |  |  |  |  |  |  | $ 116,000,000 |  |
Mezzanine Loans |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Loans and investments, gross |  | $ 61,952,792 |  | $ 61,952,792 |  | $ 76,392,650 |  |  |
Percent of Total |  | 4.00% |  | 4.00% |  | 5.00% |  |  |
Loan Count | item |  |  |  | 14 |  | 17 |  |  |
Wtd. Avg. Pay Rate (as a percent) |  |  |  | 9.44% |  | 9.78% |  |  |
Wtd. Avg. Remaining Months to Maturity |  |  |  | 44 months 24 days |  | 37 months 3 days |  |  |
First Dollar LTV Ratio (as percent) |  | 47.00% |  | 47.00% |  | 47.00% |  |  |
Last Dollar LTV Ratio (as percent) |  | 82.00% |  | 82.00% |  | 81.00% |  |  |
Junior mortgage loans |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Loans and investments, gross |  | $ 94,256,582 |  | $ 94,256,582 |  | $ 104,091,952 |  |  |
Percent of Total |  | 6.00% |  | 6.00% |  | 7.00% |  |  |
Loan Count | item |  |  |  | 3 |  | 4 |  |  |
Wtd. Avg. Pay Rate (as a percent) |  |  |  | 4.05% |  | 4.62% |  |  |
Wtd. Avg. Remaining Months to Maturity |  |  |  | 8 months 3 days |  | 12 months 9 days |  |  |
First Dollar LTV Ratio (as percent) |  | 92.00% |  | 92.00% |  | 86.00% |  |  |
Last Dollar LTV Ratio (as percent) |  | 90.00% |  | 90.00% |  | 88.00% |  |  |
Preferred equity investments |  |  |  |  |  |  |  |  |
Loans and Investments |  |  |  |  |  |  |  |  |
Loans and investments, gross |  | $ 93,270,827 |  | $ 93,270,827 |  | $ 133,505,658 |  |  |
Percent of Total |  | 6.00% |  | 6.00% |  | 8.00% |  |  |
Loan Count | item |  |  |  | 18 |  | 17 |  |  |
Wtd. Avg. Pay Rate (as a percent) |  |  |  | 6.86% |  | 6.11% |  |  |
Wtd. Avg. Remaining Months to Maturity |  |  |  | 39 months 9 days |  | 45 months 15 days |  |  |
First Dollar LTV Ratio (as percent) |  | 49.00% |  | 49.00% |  | 62.00% |  |  |
Last Dollar LTV Ratio (as percent) |  | 80.00% |  | 80.00% |  | 84.00% |  |  |

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- Definition Represents the First Dollar LTV Ratio that is calculated by comparing the total of the company's senior most dollar and all senior lien positions within the capital stack to the fair value of the underlying collateral to determine the point at which the company will absorb a total loss of its position. + References No definition available. + Details
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- Definition Unearned discounts (other than cash or quantity discounts and the like), finance charges, and interest included in the face amount of receivables, that are shown as a deduction from the related receivables. For example, 1) finance charges booked as a receivable when a loan is made and recognized as income at a later date; and 2) interest charges deducted from the face loan amount, resulting in a discounted amount actually advanced to the borrower (wherein the receivable includes the amount actually advanced to the borrower and the as yet unearned interest income). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4519-111522 + Details
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