v2.4.0.6

Stock Options (Tables) | 12 Months Ended
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Dec. 31, 2012
Stock Options [Abstract] |
Summary of stock option activity |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value (In Thousands) |
Outstanding at January 1, 2012 |  |  | 216,500 |  |  | $ | 22.22 |  |  |  |  |  |  |  |  |
Granted |  |  | 142,500 |  |  |  | 28.74 |  |  |  |  |  |  |  |  |
Exercised |  |  | (11,050 | ) |  |  | 17.93 |  |  |  |  |  |  |  |  |
Forfeited/Cancelled |  |  | (2,800 | ) |  |  | 25.41 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2012 |  |  | 345,150 |  |  | $ | 25.03 |  |  |  | 6.67 |  |  | $ | 1,824 |
Vested and exercisable at December 31, 2012 |  |  | 161,420 |  |  | $ | 23.69 |  |  |  | 4.79 |  |  | $ | 1,069 |
Stock options valuation assumptions |
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Risk-free interest rate |  |  | 0.78 | % |  |  | n/a |  |  |  | 1.76 | %
Expected dividend yield |  |  | 0.28 | % |  |  | n/a |  |  |  | 0.42 | %
Expected volatility |  |  | 44.9 | % |  |  | n/a |  |  |  | 48.3 | %
Expected lives |  |  | 5.0 years |  |  |  | n/a |  |  |  | 5.0 years |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units 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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