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Stock-Based Compensation Stock-Based Compensation (Tables)
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12 Months Ended |
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Dec. 31, 2014
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| Share-based Compensation [Abstract] |
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| Stock-Based Compensation Expense and Related Tax Benefit [Table Text Block] |
For the years ended December 31, stock-based compensation expense and the related tax benefit were as follows: | | | | | | | | | | | | | | 2014 | | 2013 | | 2012 | | (in thousands) | Stock options | $ | 2,333 |
| | $ | 2,074 |
| | $ | 1,547 |
| Restricted stock units | 14,591 |
| | 15,475 |
| | 16,583 |
| Unrestricted stock awards | 936 |
| | 811 |
| | 769 |
| ESPP | — |
| | 490 |
| | 613 |
| Total stock-based compensation | $ | 17,860 |
| | $ | 18,850 |
| | $ | 19,512 |
| | | | | | | Related tax benefit | $ | 4,994 |
| | $ | 5,152 |
| | $ | 5,377 |
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| Stock Options, Valuation Assumptions [Table Text Block] |
The fair values of stock options granted were estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions: | | | | | | | | | | | Year Ended December 31, | | 2014 | | 2013 | | 2012 | Dividend yield | — |
| | — |
| | — |
| Expected volatility | 39.3 | % | | 38.1 | % | | 42.1 | % | Risk-free interest rate | 1.7 | % | | 1.0 | % | | 0.8 | % | Expected term (years) | 5.5 |
| | 5.5 |
| | 5.1 |
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| Employee Stock Options Activity [Table Text Block] |
A summary of our stock option activity for the years ended December 31 is as follows: | | | | | | | | | | | | | | | | | | | Shares | | Weighted Average Exercise Price per Share | | Weighted Average Remaining Contractual Life | | Aggregate Intrinsic Value (1) | | Weighted Average Grant Date Fair Value | | (in thousands) | | | | (years) | | (in thousands) | | | Outstanding, January 1, 2012 | 1,109 |
| | $ | 55.97 |
| | 4.5 | | $ | 2,323 |
| | | Granted | 196 |
| | 43.27 |
| | | | | | $ | 16.51 |
| Exercised | (54 | ) | | 21.91 |
| | | | 1,078 |
| | | Expired | (114 | ) | | 69.37 |
| | | | | | | Outstanding, December 31, 2012 | 1,137 |
| | $ | 54.06 |
| | 4.8 | | $ | 3,815 |
| | | | | | | | | | | | | Granted | 129 |
| | $ | 42.76 |
| | | | | | $ | 15.44 |
| Exercised | (74 | ) | | 23.87 |
| | | | $ | 1,377 |
| | | Expired | (12 | ) | | 49.04 |
| | | | | | | Outstanding, December 31, 2013 | 1,180 |
| | $ | 54.79 |
| | 4.6 | | $ | 1,300 |
| | | | | | | | | | | | | Granted | 160 |
| | $ | 35.65 |
| | | | | | $ | 13.65 |
| Exercised | (67 | ) | | 28.03 |
| | | | $ | 826 |
| | | Forfeited | (7 | ) | | 44.06 |
| | | | | | | Expired | (143 | ) | | 68.97 |
| | | | | | | Outstanding, December 31, 2014 | 1,123 |
| | $ | 51.90 |
| | 4.4 | | $ | 1,676 |
| | | | | | | | | | | | | Exercisable, December 31, 2014 | 819 |
| | $ | 56.65 |
| | 3.2 | | $ | 569 |
| | | | | | | | | | | | | Expected to vest, December 31, 2014 | 296 |
| | $ | 39.12 |
| | 7.7 | | $ | 1,074 |
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| | (1) | The aggregate intrinsic value of outstanding stock options represents amounts that would have been received by the optionees had all in- the-money options been exercised on that date. Specifically, it is the amount by which the market value of Itron’s stock exceeded the exercise price of the outstanding in-the-money options before applicable income taxes, based on our closing stock price on the last business day of the period. The aggregate intrinsic value of stock options exercised during the period is calculated based on our stock price at the date of exercise. |
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| Schedule of Share-based Payment Award, Restricted Stock Units, Valuation Assumptions [Table Text Block] |
The weighted-average assumptions used to estimate the fair value of performance-based restricted stock units granted and the resulting weighted average fair-value are as follows:
| | | | | | | Year Ended December 31, 2014 | Year Ended December 31, 2013 | Dividend yield | — |
| — |
| Expected volatility | 32.3 | % | 39.1 | % | Risk-free interest rate | 0.4 | % | 0.3 | % | Expected term (years) | 2.0 |
| 2.5 |
| | | | Weighted-average fair value | $35.15 | $45.03 |
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| Restricted Stock Units Award Activity [Table Text Block] |
The following table summarizes restricted stock unit activity for the years ended December 31:
| | | | | | | | | | | | | Number of Restricted Stock Units | | Weighted Average Grant Date Fair Value | | Aggregate Intrinsic Value(1) | | (in thousands) | | | | (in thousands) | Outstanding, January 1, 2012 | 625 |
| | | | | Granted | 464 |
| | $ | 47.21 |
| | | Released | (275 | ) | | | | $ | 16,855 |
| Forfeited | (40 | ) | | | | | Outstanding, December 31, 2012 | 774 |
| | | | | | | | | | | Granted | 255 |
| | $ | 42.51 |
| | | Released | (331 | ) | | | | $ | 17,983 |
| Forfeited | (40 | ) | | | | | Outstanding, December 31, 2013 | 658 |
| | | | | | | | | | | Granted(2) | 350 |
| | $ | 35.74 |
| | | Released | (291 | ) | | | | $ | 14,402 |
| Forfeited | (35 | ) | | | | | Outstanding, December 31, 2014 | 682 |
| | | | | | | | | | | Vested but not released, December 31, 2014 | 19 |
| | | | $ | 821 |
| | | | | | | Expected to vest, December 31, 2014 | 571 |
| | | | $ | 24,130 |
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| | (1) | The aggregate intrinsic value is the market value of the stock, before applicable income taxes, based on the closing price on the stock release dates or at the end of the period for restricted stock units expected to vest. |
| | (2) | Restricted stock units include 14,433 shares for the 2-year award under the 2013 Performance Award Agreement, which are eligible for distribution at December 31, 2014. |
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| Unrestricted Stock Awards Activity [Table Text Block] |
The following table summarizes unrestricted stock award activity for the years ended December 31: | | | | | | | | | | | | | | 2014 | | 2013 | | 2012 | | (in thousands, except per share data) | Shares of unrestricted stock granted | 24 |
| | 18 |
| | 19 |
| | | | | | | Weighted average grant date fair value per share | $ | 39.06 |
| | $ | 44.12 |
| | $ | 41.43 |
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| Employee Stock Purchase Plan (ESPP) Activity [Table Text Block] |
The following table summarizes ESPP activity for the years ended December 31:
| | | | | | | | | | | | | | 2014 | | 2013 | | 2012 | | (in thousands, except per share data) | Shares of stock sold to employees(1) | 61 |
| | 94 |
| | 101 |
| | | | | | | Weighted average fair value per ESPP award(2) | $ | — |
| | $ | 6.61 |
| | $ | 6.29 |
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(1)Stock sold to employees during each fiscal quarter under the ESPP is associated with the offering period ending on the last day of the previous fiscal quarter.
(2)Relating to awards associated with the offering periods during the years ended December 31. Effective October 1, 2013, the ESPP is no longer compensatory and therefore the 2013 weighted average fair value per award is for the nine months ended September 30, 2013. |