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PROPERTY, PLANT AND EQUIPMENT | 12 Months Ended
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Sep. 30, 2019
Property, Plant and Equipment [Abstract] |
PROPERTY, PLANT AND EQUIPMENT | NOTE 5 PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment as of September 30, 2019 and 2018 consisted of the following:
(in thousands) | Estimated Useful Lives |  | September 30, 2019 |  | September 30, 2018
Contract drilling services equipment | 4 - 15 years |  | $ | 7,881,323 |  |  | 7,829,038 |
Tubulars | 4 years |  | 618,310 |  |  | 613,043 |
Real estate properties | 10 - 45 years |  | 72,507 |  |  | 68,888 |
Other | 2 - 23 years |  | 471,803 |  |  | 471,310 |
Construction in progress |  |  | 117,761 |  |  | 163,968 |
|  |  | 9,161,704 |  |  | 9,146,247 |
Accumulated depreciation |  |  | (4,659,620 | ) |  | (4,288,865 | )
Property, plant and equipment, net |  |  | $ | 4,502,084 |  |  | $ | 4,857,382 |
Impairments During the third quarter of fiscal year 2019, the Company's management performed a detailed assessment, considering a number of approaches, to maximize the utilization and enhance the margins of the domestic and international FlexRig4 asset groups. In June 2019, this assessment concluded that marketing a smaller fleet of these two asset groups would provide the best economic outcome. As such, the decision was made to downsize the number of domestic and international FlexRig4 drilling rigs, to be marketed to our customers, from 71 rigs to 20 domestic rigs and from 10 rigs to 8 international rigs and utilize the major interchangeable components of the decommissioned drilling rigs within these asset groups as capital spares for all of our remaining rig fleet. This has reduced the aggregate net book values of the FlexRig4 asset groups as of June 30, 2019 from $317.8 million to $107.5 million for domestic rigs and from $55.7 million to $47.8 million for international rigs. Following the downsizing process, we performed a detailed study to optimize the quantities of capital spares and drilling support equipment required to support the future operations of our rig fleet going forward. These decisions and analysis resulted in a write down of excess capital spares and drilling support equipment, which had an aggregate net book value of $235.3 million, to their estimated proceeds to ultimately be received on sale or disposal based on our historical experience with sales and disposals of similar assets, resulting in an impairment of $224.3 million ($195.0 million, net of tax, or $1.78 per diluted share), which was recorded in our Consolidated Statement of Operations for the year ended September 30, 2019. Of the $224.3 million total impairment charge recorded, $216.9 million ($188.6 million, net of tax, or $1.72 per diluted share) and $7.4 million ($6.4 million, net of tax, or $0.06 per diluted share) was recorded in our U.S. Land and International Land segment, respectively. The significant assumptions in the valuation are classified as Level 2 inputs by ASC Topic 820, Fair Value Measurement and Disclosures. Due to the downsizing of our domestic and international FlexRig4 asset groups, at June 30, 2019, we performed impairment testing on these two asset groups. We concluded that the net book values of the asset groups are recoverable through estimated undiscounted cash flows with a surplus. The most significant assumptions used in our undiscounted cash flow model include: timing on awards of future drilling contracts, operating dayrates, operating costs, rig reactivation costs, drilling rig utilization, estimated remaining useful life, and net proceeds received upon future sale/disposition. The assumptions are consistent with the Company's internal forecasts for future years. Although we believe the assumptions used in our analysis are reasonable and appropriate and the probability-weighted average of expected future undiscounted net cash flows exceed the net book value for each of the domestic and international FlexRig4 asset groups as of June 30, 2019, different assumptions and estimates could materially impact the analysis and our resulting conclusion. During the fourth quarter of fiscal year 2018, after ceasing operations in Ecuador, we entered into a sales negotiation with respect to the six conventional rigs, within a separate international conventional rigs’ asset group, with net book values of $20.8 million, present in the country, pursuant to which the rigs, together with associated equipment and machinery, were sold to a third party to be recycled. Certain components of these rigs, with an $8.5 million net book value, that were not subject to the sale agreement were transferred to the United States to be utilized on other FlexRigs with high activity and demand. The sales transaction was completed in November 2018. We recorded a non-cash impairment charge within our International Land segment of $9.2 million ($7.0 million, net of tax, or $0.06 per diluted share), which is included in Asset Impairment Charge on the Consolidated Statement of Operations for the fiscal year ended September 30, 2018. As a result, the remaining rig within the same asset group, not to be disposed of, was written down resulting in an additional impairment charge of $1.4 million ($1.0 million, net of tax, or $0.01 per diluted share). The assets were recorded at fair value based on the sales agreement and as such are classified as Level 2 within the fair value hierarchy. Furthermore, during the fourth quarter of fiscal year 2018, within our U.S. Land segment, management committed to a plan to auction several previously decommissioned rigs during fiscal year 2019. As a result, we wrote them down to their estimated fair values. We recorded a non-cash impairment charge of $5.7 million ($4.2 million, net of tax, or $0.04 per diluted share), which is included in Asset Impairment Charge on the Consolidated Statements of Operations for the fiscal year ended September 30, 2018. The assets were recorded at fair value based on the auction price and as such are classified as Level 2 of the fair value hierarchy. Depreciation Depreciation in the Consolidated Statements of Operations of $556.9 million, $578.4 million and $584.4 million includes abandonments of $11.4 million, $27.7 million and $42.6 million for fiscal years 2019, 2018 and 2017, respectively. During fiscal year 2019, we have shortened the estimated useful lives of certain components of rigs planned for conversion, resulting in an increase in depreciation expense during fiscal year 2019 of approximately $4.7 million. This will decrease the depreciation expense for fiscal years 2020, 2021, 2022, 2023, and 2024 by $0.8 million, $0.8 million, $0.6 million, $0.3 million, and $0.3 million, respectively, and thereafter by $0.5 million. Gain on Sale of Assets We had a gain on sales of assets of $39.7 million, $22.7 million and $20.6 million in fiscal years 2019, 2018 and 2017, respectively. These gains were primarily related to customer reimbursement for the replacement value of drill pipe damaged or lost in drilling operations.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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