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TAXABLE INCOME AND TAX BASIS (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
TAXABLE INCOME AND TAX BASIS |  |
Excess amount of taxable income over statement income |  | $ 530,000
Excess amount of cumulative statement basis over cumulative taxable basis |  | 12,000,000
Excess amount of statement income from joint venture investments over taxable income | $ 1,700,000 |

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X
- Definition Represents the amount by which taxable income basis is less than statement income basis due to accelerated depreciation. + References No definition available. + Details
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- Definition Represents the cumulative basis amount by which taxable income basis is less than statement income basis. + References No definition available. + Details
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- Details
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