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FEDERAL INCOME TAXES Tax Status of Dividends (Details) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax Disclosure [Abstract] |  |  |
Required Distribution Rate to Maintain REIT Status (in percent) | 90.00% |  |
Ordinary income | 68.00% | 69.00% | 87.00%
Qualified dividend | 0.00% | 0.00% | 0.00%
Capital gain | 32.00% | 31.00% | 13.00%
Total | 100.00% | 100.00% | 100.00%

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