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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2016
Property, Plant and Equipment |
Property, Plant and Equipment | Note 8 Property, Plant and Equipment The major components of our property, plant and equipment are as follows:
|  | December 31, |
|  | 2016 |  | 2015 |
|  | (In thousands) |
Land |  | $ | 46,319 |  | $ | 19,757 |
Buildings |  |  | 115,502 |  |  | 126,285 |
Drilling, workover and well-servicing rigs, and related equipment |  |  | 12,638,749 |  |  | 12,243,811 |
Marine transportation and supply vessels |  |  | — |  |  | 10,271 |
Oilfield hauling and mobile equipment |  |  | 274,137 |  |  | 286,838 |
Other machinery and equipment |  |  | 181,069 |  |  | 175,687 |
Oil and gas properties |  |  | 12,286 |  |  | 16,386 |
Construction-in-process (1) |  |  | 288,673 |  |  | 457,422 |
|  | $ | 13,556,735 |  | $ | 13,336,457 |
Less: accumulated depreciation and amortization |  |  | (7,289,152) |  |  | (6,308,655) |
|  | $ | 6,267,583 |  | $ | 7,027,802 |
| (1) |  | Relates primarily to amounts capitalized for new or substantially new drilling rigs and related equipment that were under construction and had not yet been placed in service as of December 31, 2016 or 2015.
Depreciation expense included in depreciation and amortization expense in our consolidated statements of income (loss) totaled $855.4 million, $951.4 million and $1.1 billion during 2016, 2015 and 2014, respectively. Repair and maintenance expense included in direct costs in our consolidated statements of income (loss) totaled $151.4 million, $304.7 million and $603.4 million during 2016, 2015 and 2014, respectively. Interest costs of $6.7 million, $20.4 million and $24.4 million were capitalized during 2016, 2015 and 2014, respectively.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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