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Business Segments - Business segments (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Sep. 30, 2012 | Sep. 30, 2011
Revenues | $ 35,708 | $ 33,030 | $ 102,633 | $ 94,715 |  |
Operating profit | 6,070 | 4,891 | 14,786 | 11,549 |  |
Corporate expenses | (1,050) | (899) | (3,740) | (3,359) |  |
Interest expense | 1,137 | 537 | 2,145 | 2,135 |  |
Capital expenditures | 14,016 | 16,106 | 26,948 | 23,305 |  |
Depreciation, depletion and amortization | 3,624 | 3,196 | 10,362 | 9,502 |  |
Cash items | 742 | 11,838 | 742 | 11,838 | 6,713 | 21,026
Total identifiable assets | 283,517 |  | 283,517 |  | 275,705 |
(a) Receivable on previously capitalized real estate taxes on Anacostia property |  |  | 0 | 2,250 |  |
Transportation |  |  |  |  |  |
Revenues | 28,794 | 26,907 | 82,609 | 77,197 |  |
Operating profit | 3,513 | 2,682 | 8,109 | 6,706 |  |
Corporate expenses | (406) | (396) | (1,284) | (1,187) |  |
Capital expenditures | 3,311 | 1,202 | 10,672 | 6,605 |  |
Depreciation, depletion and amortization | 1,865 | 1,690 | 5,445 | 5,018 |  |
Identifiable assets | 46,690 |  | 46,690 |  | 42,642 |
Mining royalty land |  |  |  |  |  |
Revenues | 1,299 | 1,101 | 3,874 | 3,103 |  |
Operating profit | 1,156 | 958 | 3,457 | 2,671 |  |
Corporate expenses | (176) | (164) | (528) | (491) |  |
Interest expense | 15 | 10 | 38 | 29 |  |
Capital expenditures | 0 | 11,039 | 0 | 11,039 |  |
Depreciation, depletion and amortization | 27 | 27 | 75 | 86 |  |
Identifiable assets | 39,492 |  | 39,492 |  | 39,695 |
Developed property rentals |  |  |  |  |  |
Revenues | 5,615 | 5,022 | 16,150 | 14,415 |  |
Operating profit | 2,451 | 2,150 | 6,960 | 5,531 |  |
Corporate expenses | (264) | (245) | (792) | (736) |  |
Interest expense | 1,122 | 527 | 2,107 | 2,106 |  |
Capital expenditures | 9,978 | 2,916 | 13,816 | 5,573 |  |
Capital expenditures - Capitalized interest | 367 | 533 | 1,375 | 1,111 |  |
Capital expenditures - Internal labor | 106 | 173 | 324 | 431 |  |
Capital expenditures - Real estate taxes (a) | 254 | 243 | 761 | (1,454) |  |
Depreciation, depletion and amortization | 1,629 | 1,382 | 4,532 | 4,096 |  |
Identifiable assets | 194,744 |  | 194,744 |  | 184,358 |
(a) Receivable on previously capitalized real estate taxes on Anacostia property |  |  |  |  |  |
Corporate |  |  |  |  |  |
Corporate expenses | (204) | (94) | (1,136) | (945) |  |
Depreciation, depletion and amortization | 103 | 97 | 310 | 302 |  |
Identifiable assets | $ 1,849 |  | $ 1,849 |  | $ 2,297 |

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