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Equity Incentive Plan (Tables) | 12 Months Ended
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Dec. 31, 2012
Assumptions Used to Estimate Fair Value of Stock Options and Stock Appreciation Rights Awards | The fair value of each stock option and SAR award during 2012, 2011, and 2010 was estimated on the grant date using the Black-Scholes option-pricing model with the following assumptions:
|  | December 31,
|  | 2012 |  | 2011 |  | 2010
Risk free interest rate |  | 0.63% to 0.64% |  | 1.1% to 1.51% |  | 1.11% to 1.88%
Expected volatility |  | 57.60% |  | 57.60% |  | 57.60%
Expected lives (years) |  | 4 |  | 4 |  | 4
Expected dividend yield |  | 0.00% |  | 0.00% |  | 0.00%
Combined Stock Options and Stock Appreciation Rights Activity | Combined stock options and SAR’s activity under our plans is summarized as follows for the years ended December 31, 2012 and, 2011 respectively:
|  | 2012 |  |  | 2011 |
|  |  |  |  | Weighted |  |  |  |  |  | Weighted |
|  |  |  |  | Average |  |  |  |  |  | Average |
|  |  |  |  | Exercise |  |  |  |  |  | Exercise |
|  | Number of |  |  | Price Per |  |  | Number of |  |  | Price Per |
|  | Shares |  |  | Share |  |  | Shares |  |  | Share |
Options and SAR's outstanding at beginning of year |  |  | 2,108,003 |  |  | $ | 7.26 |  |  |  | 1,625,253 |  |  | $ | 6.92 |
Granted |  |  | 204,000 |  |  | $ | 12.06 |  |  |  | 679,000 |  |  | $ | 6.98 |
Cancelled |  |  | (212,749 | ) |  | $ | 6.58 |  |  |  | (74,187 | ) |  | $ | 6.41 |
Expired |  |  | (7,714 | ) |  | $ | 1.68 |  |  |  | (875 | ) |  | $ | 3.04 |
Exercised |  |  | (297,855 | ) |  | $ | 4.74 |  |  |  | (121,188 | ) |  | $ | 1.60 |
Options and SAR's outstanding at end of year |  |  | 1,793,685 |  |  | $ | 8.30 |  |  |  | 2,108,003 |  |  | $ | 7.26 |
Restricted Stock Activity | The restricted stock activity for the years ended December 31, 2012 and 2011 is as follows:
|  | 2012 |  |  |  | 2011 |
|  |  |  |  | Weighted |  |  |  |  |  | Weighted |
|  |  |  |  | Average |  |  |  |  |  | Average |
|  | Number of |  |  | Grantd Date |  |  | Number of |  |  | Grantd Date |
|  | Shares |  |  | Fair Value |  |  | Shares |  |  | Fair Value |
Nonvested at Beginning of year |  |  | 59,196 |  |  | $ | 5.71 |  |  |  | 77,085 |  |  | $ | 5.48 |
Granted |  |  | 31,312 |  |  | $ | 9.10 |  |  |  | 29,978 |  |  | $ | 6.98 |
Cancelled |  |  | (25 | ) |  | $ | 3.05 |  |  |  | (850 | ) |  | $ | 3.05 |
Expired |  |  | - |  |  | $ | - |  |  |  | - |  |  | $ | - |
Vested/Released |  |  | (21,527 | ) |  | $ | 5.08 |  |  |  | (47,017 | ) |  | $ | 6.13 |
Nonvested at end of year |  |  | 68,956 |  |  | $ | 6.87 |  |  |  | 59,196 |  |  | $ | 5.71 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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