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Consolidated Real Estate and Accumulated Depreciation and Depletion (Tables) - Schedule III Real Estate and Accumulated Depreciation and Depletion (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2009
--- | --- | --- | --- | ---
Encumbrances | $ 62,370 |  |  |
Initial Cost to Company | 104,094 |  |  |
Cost capitalized subsequent to acquisition | 158,470 |  |  |
Gross amount at which carried at end of period | 262,564 |  |  |
Accumulated Depreciation & Depletion | 58,997 | 54,110 | 49,499 | 44,979
Aggregate cost for Federal income tax purposes | 241,650 |  |  |
Mining royalty land |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 35,089 |  |  |
Cost capitalized subsequent to acquisition | (2) |  |  |
Gross amount at which carried at end of period | 35,087 |  |  |
Accumulated Depreciation & Depletion | 5,429 |  |  |
Property leased or held for lease |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 9,353 |  |  |
Cost capitalized subsequent to acquisition | 15,570 |  |  |
Gross amount at which carried at end of period | 24,923 |  |  |
Accumulated Depreciation & Depletion | 5,317 |  |  |
Commercial Property |  |  |  |
Encumbrances | 62,370 |  |  |
Initial Cost to Company | 57,421 |  |  |
Cost capitalized subsequent to acquisition | 142,578 |  |  |
Gross amount at which carried at end of period | 199,999 |  |  |
Accumulated Depreciation & Depletion | 47,586 |  |  |
Investmentl Property |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 2,231 |  |  |
Cost capitalized subsequent to acquisition | 324 |  |  |
Gross amount at which carried at end of period | 2,555 |  |  |
Accumulated Depreciation & Depletion | 665 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | n/a |  |  |
Alachua, FL |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 1,442 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 1,442 |  |  |
Accumulated Depreciation & Depletion | 131 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Clayton, GA |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 369 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 369 |  |  |
Accumulated Depreciation & Depletion | 5 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Fayette, GA |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 685 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 685 |  |  |
Accumulated Depreciation & Depletion | 63 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Lake, FL |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 402 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 402 |  |  |
Accumulated Depreciation & Depletion | 146 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Lake Louise, FL |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 11,039 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 11,039 |  |  |
Accumulated Depreciation & Depletion | 0 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 5/12 |  |  |
Depreciation Life Computed on | unit |  |  |
Lee, FL |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 4,690 |  |  |
Cost capitalized subsequent to acquisition | 6 |  |  |
Gross amount at which carried at end of period | 4,696 |  |  |
Accumulated Depreciation & Depletion | 6 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Monroe, GA |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 792 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 792 |  |  |
Accumulated Depreciation & Depletion | 278 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Muscogee, GA |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 369 |  |  |
Cost capitalized subsequent to acquisition | (45) |  |  |
Gross amount at which carried at end of period | 324 |  |  |
Accumulated Depreciation & Depletion | 281 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Prince Wil, VA |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 299 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 299 |  |  |
Accumulated Depreciation & Depletion | 299 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Putnam, FL |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 15,002 |  |  |
Cost capitalized subsequent to acquisition | 37 |  |  |
Gross amount at which carried at end of period | 15,039 |  |  |
Accumulated Depreciation & Depletion | 4,220 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Wash DC 1 |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 2,957 |  |  |
Cost capitalized subsequent to acquisition | 15,568 |  |  |
Gross amount at which carried at end of period | 18,525 |  |  |
Accumulated Depreciation & Depletion | 3,467 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | 15 yr. |  |  |
Wash DC 2 |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 3,811 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 3,811 |  |  |
Accumulated Depreciation & Depletion | 0 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 10/97 |  |  |
Putnam, FL 2 |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 302 |  |  |
Cost capitalized subsequent to acquisition | (2) |  |  |
Gross amount at which carried at end of period | 300 |  |  |
Accumulated Depreciation & Depletion | 283 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | 5 yr. |  |  |
Spalding, GA |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 20 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 20 |  |  |
Accumulated Depreciation & Depletion | 0 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Lake, FL 2 |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 1,083 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 1,083 |  |  |
Accumulated Depreciation & Depletion | 968 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Marion, FL |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 1,180 |  |  |
Cost capitalized subsequent to acquisition | 4 |  |  |
Gross amount at which carried at end of period | 1,184 |  |  |
Accumulated Depreciation & Depletion | 599 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | unit |  |  |
Baltimore, MD 1 |  |  |  |
Encumbrances | 2,103 |  |  |
Initial Cost to Company | 439 |  |  |
Cost capitalized subsequent to acquisition | 4,411 |  |  |
Gross amount at which carried at end of period | 4,850 |  |  |
Accumulated Depreciation & Depletion | 2,750 |  |  |
Year of Construction | 1990 |  |  |
Date Acquired | 10/89 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Baltimore, MD 2 |  |  |  |
Encumbrances | 4,773 |  |  |
Initial Cost to Company | 950 |  |  |
Cost capitalized subsequent to acquisition | 6,851 |  |  |
Gross amount at which carried at end of period | 7,801 |  |  |
Accumulated Depreciation & Depletion | 4,009 |  |  |
Year of Construction | 1994 |  |  |
Date Acquired | 12/91 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Baltimore, MD 3 |  |  |  |
Encumbrances | 1,632 |  |  |
Initial Cost to Company | 690 |  |  |
Cost capitalized subsequent to acquisition | 2,861 |  |  |
Gross amount at which carried at end of period | 3,551 |  |  |
Accumulated Depreciation & Depletion | 1,239 |  |  |
Year of Construction | 2000 |  |  |
Date Acquired | 7/99 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Baltimore, MD 4 |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 5,634 |  |  |
Cost capitalized subsequent to acquisition | 12,716 |  |  |
Gross amount at which carried at end of period | 18,350 |  |  |
Accumulated Depreciation & Depletion | 528 |  |  |
Year of Construction | 2008 |  |  |
Date Acquired | 12/02 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Baltimore City, MD |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 5,750 |  |  |
Cost capitalized subsequent to acquisition | 4,257 |  |  |
Gross amount at which carried at end of period | 10,007 |  |  |
Accumulated Depreciation & Depletion | 314 |  |  |
Year of Construction | 2010 |  |  |
Date Acquired | 12/10 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Duval, FL |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 2,416 |  |  |
Cost capitalized subsequent to acquisition | 541 |  |  |
Gross amount at which carried at end of period | 2,957 |  |  |
Accumulated Depreciation & Depletion | 2,710 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 4/86 |  |  |
Depreciation Life Computed on | 25 yr. |  |  |
Harford, MD 1 |  |  |  |
Encumbrances | 1,399 |  |  |
Initial Cost to Company | 31 |  |  |
Cost capitalized subsequent to acquisition | 3,830 |  |  |
Gross amount at which carried at end of period | 3,861 |  |  |
Accumulated Depreciation & Depletion | 1,812 |  |  |
Year of Construction | 1998 |  |  |
Date Acquired | 8/95 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Harford, MD 2 |  |  |  |
Encumbrances | 2,699 |  |  |
Initial Cost to Company | 50 |  |  |
Cost capitalized subsequent to acquisition | 5,699 |  |  |
Gross amount at which carried at end of period | 5,749 |  |  |
Accumulated Depreciation & Depletion | 2,083 |  |  |
Year of Construction | 1999 |  |  |
Date Acquired | 8/95 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Harford, MD 3 |  |  |  |
Encumbrances | 4,115 |  |  |
Initial Cost to Company | 85 |  |  |
Cost capitalized subsequent to acquisition | 7,062 |  |  |
Gross amount at which carried at end of period | 7,147 |  |  |
Accumulated Depreciation & Depletion | 2,965 |  |  |
Year of Construction | 2001 |  |  |
Date Acquired | 8/95 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Harford, MD 4 |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 92 |  |  |
Cost capitalized subsequent to acquisition | 1,487 |  |  |
Gross amount at which carried at end of period | 1,579 |  |  |
Accumulated Depreciation & Depletion | 0 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 8/95 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Harford, MD 5 |  |  |  |
Encumbrances | 3,089 |  |  |
Initial Cost to Company | 88 |  |  |
Cost capitalized subsequent to acquisition | 10,133 |  |  |
Gross amount at which carried at end of period | 10,221 |  |  |
Accumulated Depreciation & Depletion | 3,249 |  |  |
Year of Construction | 2007 |  |  |
Date Acquired | 8/95 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Harford, MD 6 |  |  |  |
Encumbrances | 2,342 |  |  |
Initial Cost to Company | 155 |  |  |
Cost capitalized subsequent to acquisition | 12,262 |  |  |
Gross amount at which carried at end of period | 12,417 |  |  |
Accumulated Depreciation & Depletion | 2,843 |  |  |
Year of Construction | 2009 |  |  |
Date Acquired | 8/95 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Howard, MD 1 |  |  |  |
Encumbrances | 1,989 |  |  |
Initial Cost to Company | 2,859 |  |  |
Cost capitalized subsequent to acquisition | 4,727 |  |  |
Gross amount at which carried at end of period | 7,586 |  |  |
Accumulated Depreciation & Depletion | 3,654 |  |  |
Year of Construction | 1996 |  |  |
Date Acquired | 9/88 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Howard, MD 2 |  |  |  |
Encumbrances | 1,475 |  |  |
Initial Cost to Company | 2,473 |  |  |
Cost capitalized subsequent to acquisition | 981 |  |  |
Gross amount at which carried at end of period | 3,454 |  |  |
Accumulated Depreciation & Depletion | 1,173 |  |  |
Year of Construction | 2000 |  |  |
Date Acquired | 3/00 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Anne Arun, MD 1 |  |  |  |
Encumbrances | 655 |  |  |
Initial Cost to Company | 715 |  |  |
Cost capitalized subsequent to acquisition | 8,677 |  |  |
Gross amount at which carried at end of period | 9,392 |  |  |
Accumulated Depreciation & Depletion | 4,970 |  |  |
Year of Construction | 1989 |  |  |
Date Acquired | 9/88 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Anne Arun, MD 2 |  |  |  |
Encumbrances | 8,166 |  |  |
Initial Cost to Company | 950 |  |  |
Cost capitalized subsequent to acquisition | 13,120 |  |  |
Gross amount at which carried at end of period | 14,070 |  |  |
Accumulated Depreciation & Depletion | 3,727 |  |  |
Year of Construction | 2003 |  |  |
Date Acquired | 5/98 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Anne Arun, MD 3 |  |  |  |
Encumbrances | 7,775 |  |  |
Initial Cost to Company | 1,525 |  |  |
Cost capitalized subsequent to acquisition | 10,800 |  |  |
Gross amount at which carried at end of period | 12,325 |  |  |
Accumulated Depreciation & Depletion | 2,438 |  |  |
Year of Construction | 2005 |  |  |
Date Acquired | 8/04 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Anne Arun, MD 4 |  |  |  |
Encumbrances | 4,197 |  |  |
Initial Cost to Company | 737 |  |  |
Cost capitalized subsequent to acquisition | 5,324 |  |  |
Gross amount at which carried at end of period | 6,061 |  |  |
Accumulated Depreciation & Depletion | 1,136 |  |  |
Year of Construction | 2006 |  |  |
Date Acquired | 1/03 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Anne Arun, MD 5 |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 667 |  |  |
Cost capitalized subsequent to acquisition | 10,259 |  |  |
Gross amount at which carried at end of period | 10,926 |  |  |
Accumulated Depreciation & Depletion | 1,164 |  |  |
Year of Construction | 2012 |  |  |
Date Acquired | 7/07 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Norfolk, VA |  |  |  |
Encumbrances | 5,834 |  |  |
Initial Cost to Company | 7,512 |  |  |
Cost capitalized subsequent to acquisition | 0 |  |  |
Gross amount at which carried at end of period | 7,512 |  |  |
Accumulated Depreciation & Depletion | 1,779 |  |  |
Year of Construction | 2004 |  |  |
Date Acquired | 10/04 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Prince Wil, VA 2 |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 7,324 |  |  |
Cost capitalized subsequent to acquisition | 12,097 |  |  |
Gross amount at which carried at end of period | 19,421 |  |  |
Accumulated Depreciation & Depletion | 0 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 12/05 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Newcastle Co, DE |  |  |  |
Encumbrances | 10,127 |  |  |
Initial Cost to Company | 11,559 |  |  |
Cost capitalized subsequent to acquisition | 2,219 |  |  |
Gross amount at which carried at end of period | 13,778 |  |  |
Accumulated Depreciation & Depletion | 3,043 |  |  |
Year of Construction | 2004 |  |  |
Date Acquired | 4/04 |  |  |
Depreciation Life Computed on | 39 yr. |  |  |
Carroll, MD |  |  |  |
Encumbrances | 0 |  |  |
Initial Cost to Company | 4,720 |  |  |
Cost capitalized subsequent to acquisition | 2,264 |  |  |
Gross amount at which carried at end of period | 6,984 |  |  |
Accumulated Depreciation & Depletion | $ 0 |  |  |
Year of Construction | n/a |  |  |
Date Acquired | 3/08 |  |  |
Depreciation Life Computed on | n/a |  |  |

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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant