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Loans and Investments (Details 2) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 USD ($) item | Dec. 31, 2014 USD ($) item
Loans and Investments |  |
Unpaid Principal Balance | $ 1,595,706,784 | $ 1,587,429,498
Percentage of Portfolio | 100.00% | 100.00%
First Dollar LTV Ratio (as percent) | 10.00% | 13.00%
Last Dollar LTV Ratio (as percent) | 76.00% | 76.00%
Loans and investments portfolio | New York |  |
Loans and Investments |  |
Concentration risk, percentage | 28.00% | 28.00%
Loans and investments portfolio | Florida |  |
Loans and Investments |  |
Concentration risk, percentage | 14.00% | 14.00%
Loans and investments portfolio | Texas |  |
Loans and Investments |  |
Concentration risk, percentage | 13.00% | 10.00%
Loans and investments portfolio | California |  |
Loans and Investments |  |
Concentration risk, percentage | 10.00% |
Credit risk concentration |  |
Loans and Investments |  |
Unpaid Principal Balance | $ 1,595,706,784 | $ 1,587,429,498
Percentage of Portfolio | 100.00% | 100.00%
First Dollar LTV Ratio (as percent) | 10.00% | 13.00%
Last Dollar LTV Ratio (as percent) | 76.00% | 76.00%
Credit risk concentration | Weighted average |  |
Loans and Investments |  |
Wtd. Avg. Internal Risk Rating | item | 3.1 | 3.1
Credit risk concentration | Multifamily |  |
Loans and Investments |  |
Unpaid Principal Balance | $ 1,093,772,546 | $ 1,157,462,400
Percentage of Portfolio | 68.50% | 72.90%
First Dollar LTV Ratio (as percent) | 7.00% | 10.00%
Last Dollar LTV Ratio (as percent) | 74.00% | 73.00%
Credit risk concentration | Multifamily | Weighted average |  |
Loans and Investments |  |
Wtd. Avg. Internal Risk Rating | item | 2.9 | 2.9
Credit risk concentration | Office |  |
Loans and Investments |  |
Unpaid Principal Balance | $ 207,730,937 | $ 230,491,164
Percentage of Portfolio | 13.00% | 14.50%
First Dollar LTV Ratio (as percent) | 27.00% | 29.00%
Last Dollar LTV Ratio (as percent) | 82.00% | 79.00%
Credit risk concentration | Office | Weighted average |  |
Loans and Investments |  |
Wtd. Avg. Internal Risk Rating | item | 3.3 | 3.3
Credit risk concentration | Land |  |
Loans and Investments |  |
Unpaid Principal Balance | $ 188,844,968 | $ 128,367,601
Percentage of Portfolio | 11.80% | 8.10%
First Dollar LTV Ratio (as percent) | 4.00% | 6.00%
Last Dollar LTV Ratio (as percent) | 85.00% | 88.00%
Credit risk concentration | Land | Weighted average |  |
Loans and Investments |  |
Wtd. Avg. Internal Risk Rating | item | 3.6 | 3.9
Credit risk concentration | Hotel |  |
Loans and Investments |  |
Unpaid Principal Balance | $ 66,250,000 | $ 66,250,000
Percentage of Portfolio | 4.20% | 4.20%
First Dollar LTV Ratio (as percent) | 32.00% | 32.00%
Last Dollar LTV Ratio (as percent) | 83.00% | 83.00%
Credit risk concentration | Hotel | Weighted average |  |
Loans and Investments |  |
Wtd. Avg. Internal Risk Rating | item | 3.5 | 3.5
Credit risk concentration | Other |  |
Loans and Investments |  |
Unpaid Principal Balance | $ 39,108,333 | $ 4,858,333
Percentage of Portfolio | 2.50% | 0.30%
First Dollar LTV Ratio (as percent) | 9.00% | 69.00%
Last Dollar LTV Ratio (as percent) | 66.00% | 75.00%
Credit risk concentration | Other | Weighted average |  |
Loans and Investments |  |
Wtd. Avg. Internal Risk Rating | item | 2.6 | 2.9

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- Definition Represents the individual ratings assigned to credit risk during the loan valuation and risk assessment process. + References No definition available. + Details
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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 Represents the weighted average loan to value ratio that is calculated by comparing the total of the carrying value of the company's loan 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 initially absorb a loss. + References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 + Details
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- Definition The carrying amount of the outstanding balance due under the mortgage loan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 + Details
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