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SEGMENT INFORMATION (Tables) | 12 Months Ended
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Sep. 30, 2015
SEGMENT INFORMATION |
Summary of financial information of the entity's reportable segments for continuing operations |
(in thousands) |  | External Sales |  | Inter- Segment |  | Total Sales |  | Segment Operating Income (Loss) |  | Depreciation |  | Total Assets (as adjusted) |  | Additions to Long-Lived Assets |
2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Drilling |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Land |  | $ | 2,523,518 |  | $ | — |  | $ | 2,523,518 |  | $ | 698,375 |  | $ | 519,950 |  | $ | 5,430,533 |  | $ | 949,978 |
Offshore |  |  | 241,043 |  |  | — |  |  | 241,043 |  |  | 67,729 |  |  | 11,659 |  |  | 117,684 |  |  | 16,100 |
International Land |  |  | 386,693 |  |  | — |  |  | 386,693 |  |  | (2,930 | ) |  | 56,287 |  |  | 583,064 |  |  | 41,682 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 3,151,254 |  |  | — |  |  | 3,151,254 |  |  | 763,174 |  |  | 587,896 |  |  | 6,131,281 |  |  | 1,007,760 |
Other |  |  | 14,187 |  |  | 880 |  |  | 15,067 |  |  | (10,911 | ) |  | 19,096 |  |  | 1,012,634 |  |  | 27,518 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 3,165,441 |  |  | 880 |  |  | 3,166,321 |  |  | 752,263 |  |  | 606,992 |  |  | 7,143,915 |  |  | 1,035,278 |
Eliminations |  |  | — |  |  | (880 | ) |  | (880 | ) |  | — |  |  | — |  |  | — |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 3,165,441 |  | $ | — |  | $ | 3,165,441 |  | $ | 752,263 |  | $ | 606,992 |  | $ | 7,143,915 |  | $ | 1,035,278 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Drilling |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Land |  | $ | 3,099,954 |  | $ | — |  | $ | 3,099,954 |  | $ | 1,025,745 |  | $ | 455,934 |  | $ | 5,259,947 |  | $ | 930,263 |
Offshore |  |  | 250,811 |  |  | — |  |  | 250,811 |  |  | 69,819 |  |  | 12,300 |  |  | 137,101 |  |  | 4,372 |
International Land |  |  | 355,532 |  |  | — |  |  | 355,532 |  |  | 36,417 |  |  | 39,932 |  |  | 589,968 |  |  | 85,424 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 3,706,297 |  |  | — |  |  | 3,706,297 |  |  | 1,131,981 |  |  | 508,166 |  |  | 5,987,016 |  |  | 1,020,059 |
Other |  |  | 13,410 |  |  | 867 |  |  | 14,277 |  |  | (9,068 | ) |  | 15,383 |  |  | 726,776 |  |  | 27,117 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 3,719,707 |  |  | 867 |  |  | 3,720,574 |  |  | 1,122,913 |  |  | 523,549 |  |  | 6,713,792 |  |  | 1,047,176 |
Eliminations |  |  | — |  |  | (867 | ) |  | (867 | ) |  | — |  |  | — |  |  | — |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 3,719,707 |  | $ | — |  | $ | 3,719,707 |  | $ | 1,122,913 |  | $ | 523,549 |  | $ | 6,713,792 |  | $ | 1,047,176 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Drilling |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Land |  | $ | 2,785,449 |  | $ | — |  | $ | 2,785,449 |  | $ | 932,591 |  | $ | 391,072 |  | $ | 4,742,381 |  | $ | 726,206 |
Offshore |  |  | 221,863 |  |  | — |  |  | 221,863 |  |  | 53,064 |  |  | 13,766 |  |  | 149,128 |  |  | 4,470 |
International Land |  |  | 366,841 |  |  | — |  |  | 366,841 |  |  | 44,595 |  |  | 36,000 |  |  | 486,914 |  |  | 51,193 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 3,374,153 |  |  | — |  |  | 3,374,153 |  |  | 1,030,250 |  |  | 440,838 |  |  | 5,378,423 |  |  | 781,869 |
Other |  |  | 13,461 |  |  | 858 |  |  | 14,319 |  |  | (8,602 | ) |  | 14,785 |  |  | 881,436 |  |  | 9,872 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 3,387,614 |  |  | 858 |  |  | 3,388,472 |  |  | 1,021,648 |  |  | 455,623 |  |  | 6,259,859 |  |  | 791,741 |
Eliminations |  |  | — |  |  | (858 | ) |  | (858 | ) |  | — |  |  | — |  |  | — |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 3,387,614 |  | $ | — |  | $ | 3,387,614 |  | $ | 1,021,648 |  | $ | 455,623 |  | $ | 6,259,859 |  | $ | 791,741 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of reconciliation of segment operating income to income from continuing operations before income taxes |
|  | Years Ended September 30, |
|  | 2015 |  | 2014 |  | 2013 |
|  | (in thousands) |
Segment operating income |  | $ | 752,263 |  | $ | 1,122,913 |  | $ | 1,021,648 |
Income from asset sales |  |  | 11,716 |  |  | 19,585 |  |  | 18,923 |
Corporate general and administrative costs and corporate depreciation |  |  | (88,229 | ) |  | (87,711 | ) |  | (83,910 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating income |  |  | 675,750 |  |  | 1,054,787 |  |  | 956,661 |
Other income (expense) |  |  |  |  |  |  |  |  |  |
Interest and dividend income |  |  | 5,834 |  |  | 1,583 |  |  | 1,653 |
Interest expense |  |  | (15,036 | ) |  | (4,654 | ) |  | (6,129 | )
Gain on sale of investment securities |  |  | — |  |  | 45,234 |  |  | 162,121 |
Other |  |  | (901 | ) |  | (636 | ) |  | (9 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total unallocated amounts |  |  | (10,103 | ) |  | 41,527 |  |  | 157,636 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income from continuing operations before income taxes |  | $ | 665,647 |  | $ | 1,096,314 |  | $ | 1,114,297 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of revenues from external customers and long-lived assets by country based on the location of service provided |
|  | Years Ended September 30, |
|  | 2015 |  | 2014 |  | 2013 |
|  | (in thousands) |
Revenues |  |  |  |  |  |  |  |  |  |
United States |  | $ | 2,750,043 |  | $ | 3,338,365 |  | $ | 3,011,760 |
Argentina |  |  | 169,359 |  |  | 107,945 |  |  | 73,208 |
Colombia |  |  | 74,339 |  |  | 85,176 |  |  | 100,052 |
Ecuador |  |  | 34,211 |  |  | 69,195 |  |  | 67,890 |
Other Foreign |  |  | 137,489 |  |  | 119,026 |  |  | 134,704 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 3,165,441 |  | $ | 3,719,707 |  | $ | 3,387,614 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Long-Lived Assets |  |  |  |  |  |  |  |  |  |
United States |  | $ | 5,149,315 |  | $ | 4,753,844 |  | $ | 4,345,950 |
Argentina |  |  | 213,938 |  |  | 144,823 |  |  | 83,149 |
Colombia |  |  | 103,316 |  |  | 107,112 |  |  | 81,315 |
Ecuador |  |  | 29,142 |  |  | 70,742 |  |  | 63,894 |
Other Foreign |  |  | 71,524 |  |  | 112,023 |  |  | 101,795 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 5,567,235 |  | $ | 5,188,544 |  | $ | 4,676,103 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of all significant reconciling items in the reconciliation of total profit or loss from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, and discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 + Details
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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8736-108599 + Details
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