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Share-Based Compensation | 6 Months Ended
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Jun. 30, 2013
Share-Based Compensation |
Share-Based Compensation | Note 5 Share-Based Compensation Our share-based employee and director compensation plans are more fully described in Note 8 — Share-Based Compensation in our 2012 Annual Report. Total share-based compensation expense, which includes stock options and restricted stock, totaled $6.0 million and $4.3 million for the three months ended June 30, 2013 and 2012, respectively, and $38.8 million and $8.8 million for the six months ended June 30, 2013 and 2012, respectively. Total share-based compensation expense for the six months ended June 30, 2013 included a one-time stock grant valued at $27.0 million, which vested immediately, in connection with the termination of the 2009 employment agreement with Anthony Petrello, our Chairman, President and Chief Executive Officer. This share-based compensation expense has been recognized in other (losses) gains on sales and disposals of long-lived assets and other expense (income), net in our consolidated statement of income (loss). See Note 9 — Commitments and Contingencies for additional discussion. All other share-based compensation expense is included in direct costs and general and administrative expenses in our consolidated statements of income (loss). Share-based compensation expense has been allocated to our various operating segments. See Note 13 — Segment Information. During the six months ended June 30, 2013 and 2012, we awarded 4,688,514 and 923,131 shares of restricted stock, respectively, vesting over periods of up to four years, to our employees and directors. Some of the restricted stock awards made during the six months ended June 30, 2013 contain provisions relating to market conditions or performance measures, which may affect the grant date or vesting of such awards. All of these awards had an aggregate value at their grant date of $76.2 million and $19.2 million, respectively. The fair value of restricted stock that vested during the six months ended June 30, 2013 and 2012 was $36.3 million and $9.3 million, respectively. During the six months ended June 30, 2013 and 2012, we awarded options vesting over periods up to four years to purchase 44,375 and 634,974 of our common shares, respectively, to our employees and directors. The fair value of stock options granted during the six months ended June 30, 2013 and 2012 was calculated using the Black-Scholes option pricing model and the following weighted-average assumptions:
|  | Six Months Ended June 30, |
|  | 2013 |  | 2012 |
Weighted average fair value of options granted |  | $ | 6.25 |  | $ | 9.52 |
Weighted average risk free interest rate |  | 0.64 | % | 0.63 | %
Dividend yield |  | 0.78 | % | 0.00 | %
Volatility (1) |  | 51.01 | % | 55.91 | %
Expected life |  | 4.0 years |  | 4.0 years |
(1) Expected volatilities are based on implied volatilities from publicly traded options to purchase Nabors’ common shares, historical volatility of Nabors’ common shares and other factors. The total intrinsic value of stock options exercised during the six months ended June 30, 2013 and 2012 was $2.4 million and $5.1 million, respectively. Additionally, the intrinsic value of stock options surrendered during the six months ended June 30, 2012 was $17.9 million. The total fair value of stock options that vested during the six months ended June 30, 2013 and 2012 was $3.9 million and $7.6 million, respectively.

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- Definition The 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. + References 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 Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: 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 6: 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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-6 -Paragraph 53 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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