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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
OPERATING ACTIVITIES |  |
Net income | $ 7,548 us-gaap_NetIncomeLoss | $ 39,388 us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation, amortization and other non-cash charges | 67,555 res_DepreciationAmortizationAndOtherNonCashItems | 56,280 res_DepreciationAmortizationAndOtherNonCashItems
Stock-based compensation expense | 2,523 us-gaap_ShareBasedCompensation | 2,320 us-gaap_ShareBasedCompensation
(Gain) loss on disposition of assets, net | (958)us-gaap_GainLossOnDispositionOfAssets | 2,232 us-gaap_GainLossOnDispositionOfAssets
Deferred income tax benefit | (18,413)us-gaap_DeferredIncomeTaxExpenseBenefit | (10,192)us-gaap_DeferredIncomeTaxExpenseBenefit
Excess tax benefits for share-based payments | (1,460)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities | (4,455)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
(Increase) decrease in assets: |  |
Accounts receivable | 203,706 us-gaap_IncreaseDecreaseInAccountsReceivable | (31,043)us-gaap_IncreaseDecreaseInAccountsReceivable
Income taxes receivable | 16,063 us-gaap_IncreaseDecreaseInIncomeTaxesReceivable | 8,076 us-gaap_IncreaseDecreaseInIncomeTaxesReceivable
Inventories | 1,217 us-gaap_IncreaseDecreaseInInventories | (9,421)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses | 621 us-gaap_IncreaseDecreaseInPrepaidExpense | 506 us-gaap_IncreaseDecreaseInPrepaidExpense
Other current assets | 806 us-gaap_IncreaseDecreaseInOtherCurrentAssets | 1,692 us-gaap_IncreaseDecreaseInOtherCurrentAssets
Other non-current assets | 225 us-gaap_IncreaseDecreaseInOtherNoncurrentAssets | (117)us-gaap_IncreaseDecreaseInOtherNoncurrentAssets
Increase (decrease) in liabilities: |  |
Accounts payable | (57,944)us-gaap_IncreaseDecreaseInAccountsPayable | 19,508 us-gaap_IncreaseDecreaseInAccountsPayable
Income taxes payable | 783 us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable | 6,593 us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Accrued payroll and related expenses | (22,346)us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities | (6,181)us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Accrued insurance expenses | 862 us-gaap_IncreaseDecreaseInInsuranceLiabilities | 302 us-gaap_IncreaseDecreaseInInsuranceLiabilities
Accrued state, local and other taxes | (841)us-gaap_IncreaseDecreaseInPropertyAndOtherTaxesPayable | 1,503 us-gaap_IncreaseDecreaseInPropertyAndOtherTaxesPayable
Other accrued expenses | (17)us-gaap_IncreaseDecreaseInOtherAccruedLiabilities | 60 us-gaap_IncreaseDecreaseInOtherAccruedLiabilities
Pension liabilities | 359 us-gaap_IncreaseDecreaseInPensionPlanObligations | 396 us-gaap_IncreaseDecreaseInPensionPlanObligations
Long-term accrued insurance expenses | 769 res_IncreaseDecreaseInLongTermInsuranceExpenses | 958 res_IncreaseDecreaseInLongTermInsuranceExpenses
Other long-term liabilities | (466)us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities | (537)us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities
Net cash provided by operating activities | 200,592 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 77,868 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
INVESTING ACTIVITIES |  |
Capital expenditures | (103,492)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (40,295)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from sale of assets | 2,899 us-gaap_ProceedsFromSaleOfProductiveAssets | 2,862 us-gaap_ProceedsFromSaleOfProductiveAssets
Net cash used for investing activities | (100,593)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (37,433)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
FINANCING ACTIVITIES |  |
Payment of dividends | (22,762)us-gaap_PaymentsOfDividends | (22,986)us-gaap_PaymentsOfDividends
Borrowings from notes payable to banks | 265,400 us-gaap_ProceedsFromNotesPayable | 216,400 us-gaap_ProceedsFromNotesPayable
Repayments of notes payable to banks | (334,300)us-gaap_RepaymentsOfNotesPayable | (188,900)us-gaap_RepaymentsOfNotesPayable
Debt issue costs for notes payable to banks |  | (667)us-gaap_PaymentsOfDebtIssuanceCosts
Excess tax benefits for share-based payments | 1,460 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 4,455 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Cash paid for common stock purchased and retired | (4,093)us-gaap_PaymentsForRepurchaseOfCommonStock | (13,144)us-gaap_PaymentsForRepurchaseOfCommonStock
Net cash used for financing activities | (94,295)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (4,842)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net increase in cash and cash equivalents | 5,704 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 35,593 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period | 9,772 us-gaap_CashAndCashEquivalentsAtCarryingValue | 8,700 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period | 15,476 us-gaap_CashAndCashEquivalentsAtCarryingValue | 44,293 us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental cash flows disclosure: |  |
Interest paid, net of amounts capitalized | 608 us-gaap_InterestPaidNet | 256 us-gaap_InterestPaidNet
Income taxes paid, net | 4,423 us-gaap_IncomeTaxesPaidNet | 19,999 us-gaap_IncomeTaxesPaidNet
Supplemental disclosure of noncash investing activities: |  |
Capital expenditures included in accounts payable | $ 13,413 res_CapitalExpendituresIncludedInAccountsPayable | $ 22,432 res_CapitalExpendituresIncludedInAccountsPayable

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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash outflow for a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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