2.4.0.8015 - Disclosure - Note 10 - Stock Based Compensationtruefalsefalse1false falsefalsec2_From1Jan2013To30Jun2013http://www.sec.gov/CIK0001121484duration2013-01-01T00:00:002013-06-30T00:00:001true 1ois_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockAbstractois_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Disclosure of Compensation Related Costs, Share-based Payments [Text Block]2false 2us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00 10.  STOCK BASED COMPENSATION  During the first six months of 2013, we granted restricted stock awards totaling 308,539 shares valued at a total of $25.0 million. Of the restricted stock awards granted in the first six months of 2013, a total of 264,557 awards vest in four equal annual installments beginning in February 2014, 30,314 awards are performance based awards that may vest in February 2016 in an amount that will depend on the Company’s achievement of specified performance objectives, 9,880 awards vest 100% in May 2014 and 3,500 awards vest 100% in February 2014. The 2013 performance based awards have a performance criteria that will be measured based upon the Company’s achievement levels of average after-tax annual return on invested capital for the three year period commencing January 1, 2013 and ending December 31, 2015. During the six months ended June 30, 2013, the Company also granted 71,500 units of phantom shares under the Canadian Long-Term Incentive Plan, which provides for the granting of units of phantom shares to key Canadian employees. These awards vest in three equal annual installments beginning in February 2014 and are accounted for as a liability until paid. Participants granted units of phantom shares are entitled to a lump sum cash payment equal to the fair market value of a share of the Company’s common stock on the vesting date. A total of 149,402 stock options with a ten-year term were awarded in the six months ended June 30, 2013 with an average exercise price of $80.25, a fair value of $4.2 million and that will vest in four equal annual installments starting in February 2014. Stock based compensation pre-tax expense recognized in the six month periods ended June 30, 2013 and 2012 totaled $13.1 million and $9.2 million, or $0.17 and $0.12 per diluted share after tax, respectively. Stock based compensation pre-tax expense recognized in the three month periods ended June 30, 2013 and 2012 totaled $6.8 million and $4.8 million, or $0.09 and $0.07 per diluted share after tax, respectively. The total fair value of restricted stock awards that vested during the six months ended June 30, 2013 and 2012 was $14.7 million and $15.8 million, respectively. At June 30, 2013, $55.0 million of compensation cost related to unvested stock options and restricted stock awards attributable to future performance had not yet been recognized. falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 false0Disclosure of Compensation Related Costs, Share-based Payments [Text Block]falseNote 10 - Stock Based CompensationUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://oilstatesintl.com/role/Note10StockBasedCompensation12