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Summary of Significant Accounting Policies | 12 Months Ended
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Dec. 31, 2013
Summary of Significant Accounting Policies |
Summary of Significant Accounting Policies | Note 3 Summary of Significant Accounting Policies Principles of Consolidation Our consolidated financial statements include the accounts of Nabors, as well as all majority owned and non-majority owned subsidiaries required to be consolidated under GAAP. All significant intercompany accounts and transactions are eliminated in consolidation. Investments in operating entities where we have the ability to exert significant influence, but where we do not control operating and financial policies, are accounted for using the equity method. Our share of the net income (loss) of these entities is recorded as earnings (losses) from unconsolidated affiliates in our consolidated statements of income (loss). The investments in these entities are included in investment in unconsolidated affiliates in our consolidated balance sheets. Cash and Cash Equivalents Cash and cash equivalents include demand deposits and various other short-term investments with original maturities of three months or less. Investments Short-term investments Short-term investments consist of equity securities, corporate debt securities, mortgage-backed debt securities and asset-backed debt securities. Securities classified as available-for-sale are stated at fair value. Unrealized holding gains and temporary losses for available-for-sale securities are excluded from earnings and, until realized, are presented in the statement of other comprehensive income (loss). Unrealized holding losses are included in earnings during the period for which the loss is determined to be other-than-temporary. In computing realized gains and losses on the sale of equity securities, the specific-identification method is used. In accordance with this method, the cost of the equity securities sold is determined using the specific cost of the security when originally purchased. Long-term investments and other receivables We have investments in overseas funds that invest primarily in a variety of public and private U.S. and non-U.S. securities (including asset-backed and mortgage-backed securities, global structured-asset securitizations, whole-loan mortgages, and participations in whole loans and whole-loan mortgages). These investments are non-marketable and do not have published fair values. The fair value of these investments approximates their carrying value and totaled $3.2 million and $4.3 million as of December 31, 2013 and 2012, respectively. Inventory Inventory is stated at the lower of cost or market. Cost is determined using the first-in, first-out or weighted-average costs methods and includes the cost of materials, labor and manufacturing overhead. Inventory included the following:
|  | December 31, |
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|  | 2013 |  | 2012 |
|  | (In thousands) |
Raw materials |  | $ | 128,606 |  | $ | 148,822 |
Work-in-progress |  |  | 26,762 |  |  | 45,733 |
Finished goods |  |  | 54,425 |  |  | 56,578 |
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|  | $ | 209,793 |  | $ | 251,133 |
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Property, Plant and Equipment Property, plant and equipment, including renewals and betterments, are stated at cost, while maintenance and repairs are expensed currently. Interest costs applicable to the construction of qualifying assets are capitalized as a component of the cost of such assets. We provide for the depreciation of our drilling and workover rigs using the units-of-production method. For each day a rig is operating, we depreciate it over an approximate 4,927-day period, with the exception of our jackup rigs which are depreciated over an 8,030-day period, after provision for salvage value. For each day a rig asset is not operating, it is depreciated over an assumed depreciable life of 20 years, with the exception of our jackup rigs, where a 30-year depreciable life is used, after provision for salvage value. Depreciation on our buildings, well-servicing rigs, oilfield hauling and mobile equipment, marine transportation and supply vessels, and other machinery and equipment is computed using the straight-line method over the estimated useful life of the asset after provision for salvage value (buildings—10 to 30 years; well-servicing rigs—3 to 15 years; marine transportation and supply vessels—10 to 25 years; oilfield hauling and mobile equipment and other machinery and equipment—3 to 10 years). Amortization of capitalized leases is included in depreciation and amortization expense. Upon retirement or other disposal of fixed assets, the cost and related accumulated depreciation are removed from the respective property, plant and equipment accounts and any gains or losses are included in our income statement. We review our assets for impairment annually or when events or changes in circumstances indicate that their carrying amounts may not be recoverable. An impairment loss is recorded in the period in which it is determined that the sum of estimated future cash flows, on an undiscounted basis, is less than the carrying amount of the long-lived asset. Impairment charges are recorded using discounted cash flows which requires the estimation of dayrates and utilization, and such estimates can change based on market conditions, technological advances in the industry or changes in regulations governing the industry. For an asset classified as held for sale, we consider the asset impaired when its carrying amount exceeds fair value less its cost to sell. Fair value is determined in the same manner as an impaired long-lived asset that is held and used. Significant and unanticipated changes to the assumptions could result in future impairments. A significantly prolonged period of lower oil and natural gas prices could adversely affect the demand for and prices of our services, which could result in future impairment charges. As the determination of whether impairment charges should be recorded on our long-lived assets is subject to significant management judgment, and an impairment of these assets could result in a material charge on our consolidated statements of income (loss), management believes that accounting estimates related to impairment of long-lived assets are critical. Goodwill We initially assess goodwill for impairment based on qualitative factors to determine whether to perform the two-step annual goodwill impairment test, a Level 3 fair value measurement. After qualitative assessment, step one of the impairment test compares the estimated fair value of the reporting unit to its carrying amount. If the carrying amount exceeds the fair value, a second step is required to measure the goodwill impairment loss. The second step compares the implied fair value of the reporting unit's goodwill to its carrying amount. If the carrying amount exceeds the implied fair value, an impairment loss is recognized in an amount equal to the excess. The fair values calculated in these impairment tests were determined using discounted cash flow models involving assumptions based on our utilization of rigs or other oil and gas service equipment, revenues and earnings from affiliates, as well as direct costs, general and administrative costs, depreciation, applicable income taxes, capital expenditures and working capital requirements. Our discounted cash flow projections for each reporting unit were based on financial forecasts. The future cash flows were discounted to present value using discount rates determined to be appropriate for each reporting unit. Terminal values for each reporting unit were calculated using a Gordon Growth methodology with a long-term growth rate of 3%. Our estimated fair values of our reporting units incorporate judgment and the use of estimates by management. Potential factors requiring assessment include a further or sustained decline in our stock price, declines in oil and natural gas prices, a variance in results of operations from forecasts, and additional transactions in the oil and gas industry. Another factor in determining whether impairment has occurred is the relationship between our market capitalization and our book value. As part of our annual review, we compared the sum of our reporting units' estimated fair value, which included the estimated fair value of non-operating assets and liabilities, less debt, to our market capitalization and assessed the reasonableness of our estimated fair value. Any of the above-mentioned factors may cause us to re-evaluate goodwill during any quarter throughout the year. The change in the carrying amount of goodwill for our business lines for the years ended December 31, 2012 and 2013 was as follows:
|  | Balance at December 31, 2011 |  | Acquisitions and Purchase Price Adjustments |  | Disposals and Impairments |  | Cumulative Translation Adjustment |  | Balance at December 31, 2012 |
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|  | (In thousands) |
Drilling & Rig Services: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  | $ | 57,445 |  | $ | — |  | $ | (7,296 | )(1) | $ | — |  | $ | 50,149 |
International |  |  | 18,983 |  |  | — |  |  | (18,983 | )(1) |  | — |  |  | — |
Rig Services |  |  | 34,766 |  |  | — |  |  | (3,035 | )(2) |  | 382 |  |  | 32,113 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Subtotal Drilling & Rig Services |  |  | 111,194 |  |  | — |  |  | (29,314 | ) |  | 382 |  |  | 82,262 |
Completion & Production Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Completion |  |  | 334,992 |  |  | — |  |  | — |  |  | — |  |  | 334,992 |
Production |  |  | 55,072 |  |  | — |  |  | — |  |  | — |  |  | 55,072 |
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Subtotal Completion & Production |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services |  |  | 390,064 |  |  | — |  |  | — |  |  | — |  |  | 390,064 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 501,258 |  | $ | — |  | $ | (29,314 | ) | $ | 382 |  | $ | 472,326 |
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|  | Balance at December 31, 2012 |  | Acquisitions and Purchase Price Adjustments |  | Disposals and Impairments |  | Cumulative Translation Adjustment |  | Balance at December 31, 2013 |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
|  | (In thousands) |
Drilling & Rig Services: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  | $ | 50,149 |  | $ | — |  | $ | — |  | $ | — |  | $ | 50,149 |
Rig Services |  |  | 32,113 |  |  | 15,828 | (3) |  | (9,631 | )(4) |  | (1,049 | ) |  | 37,261 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Subtotal Drilling & Rig Services |  |  | 82,262 |  |  | 15,828 |  |  | (9,631 | ) |  | (1,049 | ) |  | 87,410 |
Completion & Production Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Completion |  |  | 334,992 |  |  |  |  |  | — |  |  | — |  |  | 334,992 |
Production |  |  | 55,072 |  |  | 35,490 | (5) |  | — |  |  | — |  |  | 90,562 |
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Subtotal Completion & Production |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services |  |  | 390,064 |  |  | 35,490 |  |  | — |  |  | — |  |  | 425,554 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 472,326 |  | $ | 51,318 |  | $ | (9,631 | ) | $ | (1,049 | ) | $ | 512,964 |
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(1) Represents the impairment of goodwill associated with our operations in our U.S. and International drilling operating segments. As of December 31, 2012, our International operating segment had no recorded goodwill. (2) Represents the removal of goodwill in connection with our sale of a subsidiary that provided trucking and logistics services. (3) Represents the goodwill recorded in connection with our acquisition of NES. See Note 6—Acquisitions for additional discussion. (4) Represents the removal of goodwill in connection with our sale of Peak and the logistic assets from one of our Canada subsidiaries. (5) Represents the goodwill recorded in connection with our acquisition of KVS. See Note 6—Acquisitions for additional discussion. Goodwill for the consolidated company, totaling approximately $76.7 million, is expected to be deductible for tax purposes. Litigation and Insurance Reserves We estimate our reserves related to litigation and insurance based on the facts and circumstances specific to the litigation and insurance claims and our past experience with similar claims. We maintain actuarially determined accruals in our consolidated balance sheets to cover self-insurance retentions. See Note 19—Commitments and Contingencies regarding self-insurance accruals. We estimate the range of our liability related to pending litigation when we believe the amount and range of loss can reasonably be estimated. We record our best estimate of a loss when the loss is considered probable. When a liability is probable and there is a range of estimated loss with no best estimate in the range, we record the minimum estimated liability related to the lawsuits or claims. As additional information becomes available, we assess the potential liability related to our pending litigation and claims and revise our estimates. Due to uncertainties related to the resolution of lawsuits and claims, the ultimate outcome may differ from our estimates. For matters where an unfavorable outcome is reasonably possible and significant, we disclose the nature of the matter and a range of potential exposure, unless an estimate cannot be made at the time of disclosure. Revenue Recognition We recognize revenues and costs on daywork contracts daily as the work progresses. For certain contracts, we receive lump-sum payments for the mobilization of rigs and other drilling equipment. We defer revenue related to mobilization periods and recognize the revenue over the term of the related drilling contract. Costs incurred related to a mobilization period for which a contract is secured are deferred and recognized over the term of the related drilling contract. Costs incurred to relocate rigs and other drilling equipment to areas in which a contract has not been secured are expensed as incurred. We defer recognition of revenue on amounts received from customers for prepayment of services until those services are provided. We recognize revenue for top drives and instrumentation systems we manufacture when the earnings process is complete. This generally occurs when products have been shipped, title and risk of loss have been transferred, collectability is probable, and pricing is fixed and determinable. In connection with the performance of our cementing services, we recognize product and service revenue when the products are delivered or services are provided to the customer and collectability is reasonably assured. Product sale prices are determined by published price lists provided to our customers. We recognize, as operating revenue, proceeds from business interruption insurance claims in the period that the applicable proof of loss documentation is received. Proceeds from casualty insurance settlements in excess of the carrying value of damaged assets are recognized in losses (gains) on sales and disposals of long-lived assets and other expense (income), net in the period that the applicable proof of loss documentation is received. Proceeds from casualty insurance settlements that are expected to be less than the carrying value of damaged assets are recognized at the time the loss is incurred and recorded in losses (gains) on sales and disposals of long-lived assets and other expense (income), net. We recognize reimbursements received for out-of-pocket expenses incurred as revenues and account for out-of-pocket expenses as direct costs. Income Taxes We are a Bermuda exempted company and are not subject to income taxes in Bermuda. Consequently, income taxes have been provided based on the tax laws and rates in effect in the countries where we operate and earn income. The income taxes in these jurisdictions vary substantially. Our effective tax rate for financial statement purposes will continue to fluctuate from year to year because our operations are conducted in different taxing jurisdictions. We recognize increases to our tax reserves for uncertain tax positions along with interest and penalties as an increase to other long-term liabilities. For U.S. and other jurisdictional income tax purposes, we have net operating and other loss carryforwards that we are required to assess quarterly for potential valuation allowances. We consider the sufficiency of existing temporary differences and expected future earnings levels in determining the amount, if any, of valuation allowance required against such carryforwards and against deferred tax assets. Nabors realizes an income tax benefit associated with certain awards issued under our stock plans. We recognize the benefits related to tax deductions up to the amount of the compensation expense recorded for the award in the consolidated statements of income (loss). Any excess tax benefit (i.e., tax deduction in excess of compensation expense) is reflected as an increase in capital in excess of par. Any shortfall is recorded as a reduction to capital in excess of par to the extent of our aggregate accumulated pool of windfall benefits, beyond which the shortfall would be recognized in the consolidated statements of income (loss). Foreign Currency Translation For certain of our foreign subsidiaries, such as those in Canada and Argentina, the local currency is the functional currency, and therefore translation gains or losses associated with foreign-denominated monetary accounts are accumulated in a separate section of the consolidated statements of changes in equity. For our other international subsidiaries, the U.S. dollar is the functional currency, and therefore local currency transaction gains and losses, arising from remeasurement of payables and receivables denominated in local currency, are included in our consolidated statements of income (loss). Cash Flows We treat the redemption price, including accrued original issue discount, on our convertible debt instruments as a financing activity for purposes of reporting cash flows in our consolidated statements of cash flows. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the balance sheet date and the amounts of revenues and expenses recognized during the reporting period. Actual results could differ from such estimates. Areas where critical accounting estimates are made by management include: • depreciation of property, plant and equipment; • impairment of long-lived assets; • impairment of goodwill and intangible assets; • income taxes; • litigation and self-insurance reserves; and • fair value of assets acquired and liabilities assumed.

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