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Income Taxes - Summary of Deferred Income Tax Assets (Liabilities) (Detail) (USD $)
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Dec. 31, 2013
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Dec. 31, 2012
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|---|---|---|
| Deferred Income Tax Assets | ||
| Depreciation | $ 1,899,202 | $ 2,142,204 |
| Deferred Compensation | 147,588 | 319,786 |
| Charitable Contributions Carryforward | 252,619 | |
| Deferred Oil Lease Income | 922,254 | 256,716 |
| Deferred Lease Expense | 1,288,555 | 1,428,121 |
| Pension and Other Post Retirement Benefits | (48,342) | 593,489 |
| Stock Options | 837,156 | 766,042 |
| Impairment Reserves | 1,688,979 | 1,688,979 |
| Other - Net | 40,259 | 95,856 |
| Gross Deferred Income Tax Assets | 6,775,651 | 7,543,812 |
| Less - Valuation Allowance | (415,453) | (621,528) |
| Net Deferred Income Tax Assets | 6,360,198 | 6,922,284 |
| Deferred Income Tax Liabilities | ||
| Sales of Real Estate | (37,810,005) | (38,937,151) |
| Commercial Mortgage Purchase Discount | (504,886) | |
| Basis Difference in Joint Venture | (342,015) | (342,638) |
| Other - Net | (255,360) | |
| Total Deferred Income Tax Liabilities | (38,912,266) | (39,279,789) |
| Net Deferred Income Tax Liabilities | $ (32,552,068) | $ (32,357,505) |