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Investment Portfolio (Tables) | 12 Months Ended
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Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract] |
Summary of market value of investments | The following table summarizes the fair value of these investments as of December 31, 2014 and 2013:
| As of December 31,
| 2014 |  | 2013
Seed Capital Investments: |  |  |
Diamond Hill Research Opportunities Fund | $ | 13,143,281 |  |  | $ | 13,305,830 |
Diamond Hill Mid Cap Fund | 10,729,930 |  |  | — |
Diamond Hill Financial Long-Short Fund | 1,222,892 |  |  | 1,131,034 |
Diamond Hill High Yield Fund, L.P. | 9,764,814 |  |  | — |
Diamond Hill Valuation-Weighted 500, L.P. | 3,398,035 |  |  | 3,000,328 |
Diamond Hill Global Fund, L.P. | 1,489,740 |  |  | — |
Diamond Hill Investment Partners, L.P. | — |  |  | 1,133 |
Total Seed Capital Investments | 39,748,692 |  |  | 17,438,325 |
Deferred Compensation Investments | 5,678,764 |  |  | 1,287,745 |
Total Investment Portfolio | $ | 45,427,456 |  |  | $ | 18,726,070 |
Carrying value and income from the Partnerships | Summary financial information, including the Company’s carrying value and income from the Partnerships, is as follows:
| As of December 31,
| 2014 |  | 2013 |  | 2012
Total partnership assets | $ | 128,182,211 |  |  | $ | 122,106,403 |  |  | $ | 105,472,952 |
Total partnership liabilities | 21,782,571 |  |  | 25,217,600 |  |  | 17,786,579 |
Net partnership assets | $ | 106,399,640 |  |  | $ | 96,888,803 |  |  | $ | 87,686,373 |
DHCM’s portion of net assets | $ | 14,652,589 |  |  | $ | 3,001,461 |  |  | $ | 3,650,561 |
| For the Year Ended December 31,
| 2014 |  | 2013 |  | 2012
Net partnership income | $ | 8,870,418 |  |  | $ | 24,294,495 |  |  | $ | 15,054,951 |
DHCM’s portion of net income | $ | 491,951 |  |  | $ | 899,958 |  |  | $ | 472,659 |

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- Definition Tabular disclosure of the summary of investment holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C) -URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611225-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Article 12 + Details
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