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Investment Portfolio (Tables) | 12 Months Ended
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Dec. 31, 2015
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, 2015 and 2014:
| As of December 31,
| 2015 |  | 2014
Corporate Investments: |  |  |
Diamond Hill Mid Cap Fund | $ | 10,749,860 |  |  | $ | 10,729,930 |
Diamond Hill Research Opportunities Fund | 10,306,395 |  |  | 13,143,281 |
Diamond Hill Financial Long-Short Fund | 967,721 |  |  | 1,222,892 |
Diamond Hill Valuation-Weighted 500 ETF(a) | 11,221,323 |  |  | — |
Diamond Hill Valuation-Weighted 500, L.P.(a) | — |  |  | 3,398,035 |
Diamond Hill High Yield Fund, L.P. | 9,874,099 |  |  | 9,764,814 |
Diamond Hill Global Fund, L.P. | 1,410,010 |  |  | 1,489,740 |
Total Corporate Investments | 44,529,408 |  |  | 39,748,692 |
Deferred Compensation Investments | 7,961,412 |  |  | 5,678,764 |
Total Investment Portfolio | $ | 52,490,820 |  |  | $ | 45,427,456 |
(a) During the second quarter of 2015, the Company converted the Diamond Hill Valuation-Weighted 500, L.P. to the Diamond Hill Valuation-Weighted 500 ETF by liquidating its investment in the partnership and purchasing into the Diamond Hill Valuation-Weighted 500 ETF.
Carrying value and income from the Partnerships | Summary financial information, including the Company’s carrying value and income is as follows for DHIP and the Remaining LPs, respectively:
Summary Financial Information - DHIP | As of December 31,
| 2015 |  | 2014 |  | 2013
Total assets | $ | 104,763,018 |  |  | $ | 113,050,560 |  |  | $ | 118,989,180 |
Total liabilities | 24,622,223 |  |  | 21,779,556 |  |  | 25,217,600 |
Net assets | $ | 80,140,795 |  |  | $ | 91,271,004 |  |  | $ | 93,771,580 |
DHCM’s portion of net assets | $ | — |  |  | $ | — |  |  | $ | 1,133 |
| For the Year Ended December 31,
| 2015 |  | 2014 |  | 2013
Net income (loss) | $ | (9,145,162 | ) |  | $ | 8,346,265 |  |  | $ | 23,358,257 |
DHCM’s portion of net income | $ | — |  |  | $ | — |  |  | $ | 1,798 |
Summary Financial Information - Remaining LPs | As of December 31,
| 2015 |  | 2014 |  | 2013
Total assets | $ | 11,653,249 |  |  | $ | 15,131,651 |  |  | $ | 3,117,223 |
Total liabilities | 25,996 |  |  | 3,015 |  |  | — |
Net assets | $ | 11,627,253 |  |  | $ | 15,128,636 |  |  | $ | 3,117,223 |
DHCM’s portion of net assets | $ | 11,274,109 |  |  | $ | 14,652,589 |  |  | $ | 3,000,328 |
| For the Year Ended December 31,
| 2015 |  | 2014 |  | 2013
Net income | $ | 127,703 |  |  | $ | 524,153 |  |  | $ | 936,238 |
DHCM’s portion of net income | $ | 124,825 |  |  | $ | 491,951 |  |  | $ | 898,160 |

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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=50485924&loc=d3e611225-123010 + Details
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