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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 12, 2015 item | Sep. 30, 2015 USD ($) ft² item | Sep. 30, 2014 USD ($) | Sep. 30, 2013 USD ($) | Sep. 30, 2012 USD ($)
COMMITMENTS AND CONTINGENCIES |  |  |  |  |
Number of new FlexRigs to build and operate (in rigs) | item |  | 6 |  |  |
Number of new FlexRigs under construction (in rigs) | item | 6 |  |  |  |
Purchase orders outstanding for drilling equipment |  | $ 81,100 |  |  |
LEASES |  |  |  |  |
Area of leased office space (in square feet) | ft² |  | 215,600 |  |  |
Fiscal Year |  |  |  |  |
2016 |  | $ 7,803 |  |  |
2017 |  | 6,246 |  |  |
2018 |  | 4,304 |  |  |
2019 |  | 4,236 |  |  |
2020 |  | 3,711 |  |  |
Thereafter |  | 12,335 |  |  |
Total |  | 38,635 |  |  |
Rent expense |  |  |  |  |
Total rent expense |  | 13,600 | $ 12,100 | $ 9,900 |
CONTINGENCIES |  |  |  |  |
Gain contingencies recognized in consolidated financial statements |  | $ 0 |  |  |
Proceeds from settlement of arbitration disputes with third parties not affiliated with the Venezuelan government, Petroleo or PDVSA related to seizure of property in Venezuela |  |  |  | $ 15,000 | $ 7,500

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