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Business Segments - Business Segments (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Revenues | $ 139,774 | $ 127,514 | $ 120,106 |
Operating profit | 20,434 | 14,101 | 14,369 |
Interest expense | 2,520 | 2,638 | 3,346 |
Capital expenditures | 38,548 | 34,348 | 17,872 |
Capital expenditures - capitalized interest | 1,863 | 1,646 | 1,232 |
Depreciation, depletion and amortization | 14,065 | 12,994 | 12,210 |
Identifiable net assets | 286,591 | 268,992 | 245,250 |
Discontinued transportation assets |  |  | 114 |
Cash items | 502 | 6,713 | 21,026 | 17,151
(a) Receivable on previously capitalized real estate taxes on Anacostia property |  | 2,311 |  |
(b) 1031 exchange of real estate |  |  | 4,941 |
Transportation |  |  |  |
Revenues | 112,120 | 103,476 | 97,801 |
Operating profit | 11,119 | 9,107 | 9,602 |
Corporate expenses | (1,765) | (1,631) | (1,574) |
Capital expenditures | 15,612 | 10,459 | 6,743 |
Depreciation, depletion and amortization | 7,401 | 6,750 | 6,269 |
Identifiable net assets | 49,410 | 42,642 | 39,001 |
Mining royalty land |  |  |  |
Revenues | 5,302 | 4,483 | 4,261 |
Operating profit | 4,739 | 3,905 | 3,507 |
Corporate expenses | (731) | (674) | (650) |
Interest expense | 59 | 40 | 37 |
Capital expenditures | 0 | 11,039 | 0 |
Depreciation, depletion and amortization | 105 | 112 | 111 |
Identifiable net assets | 40,008 | 39,695 | 28,295 |
Developed property rentals |  |  |  |
Revenues | 22,352 | 19,555 | 18,044 |
Operating profit | 9,427 | 5,497 | 5,874 |
Corporate expenses | (1,094) | (1,012) | (975) |
Interest expense | 2,461 | 2,598 | 3,309 |
Capital expenditures | 19,751 | 11,804 | 8,082 |
Capital expenditures - capitalized interest | 1,863 | 1,646 | 1,232 |
Capital expenditures - internal labor | 418 | 609 | 603 |
Capital expenditures - real estate taxes (a) | 904 | (1,209) | 1,212 |
Depreciation, depletion and amortization | 6,141 | 5,729 | 5,222 |
Identifiable net assets | 195,476 | 184,358 | 175,618 |
(a) Receivable on previously capitalized real estate taxes on Anacostia property |  | 2,311 |  |
(b) 1031 exchange of real estate |  |  | 4,941 |
Corporate |  |  |  |
Corporate expenses | (1,261) | (1,091) | (1,415) |
Depreciation, depletion and amortization | 418 | 403 | 608 |
Identifiable net assets | $ 1,697 | $ 2,297 | $ 2,336 |

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