2.4.0.8045 - Disclosure - Note 9 - Changes in Common Stock Outstanding (Details) - Changes in Common Stock Outstandingtruefalsefalse1false falsefalsec2_From1Jan2013To30Jun2013http://www.sec.gov/CIK0001121484duration2013-01-01T00:00:002013-06-30T00:00:00sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli01true 1ois_ChangesInCommonStockOutstandingAbstractois_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Changes in Common Stock Outstanding [Abstract]2false 2us-gaap_CommonStockSharesOutstandingus-gaap_truenainstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse5469547354695473falsefalsefalsexbrli:sharesItemTypesharesNumber of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 false1Shares of common stock outstanding3false 2us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGrossus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse519839519839falsefalsefalsexbrli:sharesItemTypesharesGross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.No definition available.false1Shares issued upon exercise of stock options and vesting of restricted stock awards4false 2us-gaap_TreasuryStockSharesAcquiredus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedTerseLabel1truefalsefalse-20000-20000falsefalsefalsexbrli:sharesItemTypesharesNumber of shares that have been repurchased during the period and are being held in treasury.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 false1Repurchase of shares – transferred to treasury5false 2us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensationus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-46444-46444falsefalsefalsexbrli:sharesItemTypesharesFor net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.No definition available.false1Shares withheld for taxes on vesting of restricted stock awards and transferred to treasury6false 2us-gaap_CommonStockSharesOutstandingus-gaap_truenainstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse5514886855148868falsefalsefalsexbrli:sharesItemTypesharesNumber of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 false1Shares of common stock outstandingfalseNote 9 - Changes in Common Stock Outstanding (Details) - Changes in Common Stock OutstandingUnKnownNoRoundingUnKnownUnKnowntruefalsefalseSheethttp://oilstatesintl.com/role/ChangesinCommonStockOutstandingTable16