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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of stock option activity | Activity for the 04 Plan, the 07 Incentive Plan and awards made outside of share-based compensation plans for the years ended December 31, 2012, 2011 and 2010 is presented below (in thousands, except per common share data):
| Number of Shares |  | Weighted Average Grant Date Fair Value
Balance, December 31, 2009 | 186 |  |  | $ | 43.52 |
Granted | 222 |  |  | $ | 36.02 |
Vested | (73 | ) |  | $ | 41.51 |
Cancelled/forfeited | (1 | ) |  | $ | 45.35 |
Balance, December 31, 2010 | 334 |  |  | $ | 38.96 |
Granted | 156 |  |  | $ | 42.95 |
Vested | (70 | ) |  | $ | 42.21 |
Cancelled/forfeited | (1 | ) |  | $ | 35.81 |
Balance, December 31, 2011 | 419 |  |  | $ | 40.01 |
Granted | 182 |  |  | $ | 51.99 |
Vested | (221 | ) |  | $ | 44.77 |
Cancelled/forfeited | (1 | ) |  | $ | 39.12 |
Balance, December 31, 2012 | 379 |  |  | $ | 42.97 |
Activity for stock options granted by the Company during the years ended December 31, 2012, 2011 and 2010 is presented below (in thousands, except per common share data):
| Number of Shares Under Option |  | Weighted Average Exercise Price
Balance, December 31, 2009 | 209 |  |  | $ | 36.39 |
Granted | 188 |  |  | $ | 35.22 |
Exercises | (4 | ) |  | $ | 27.75 |
Cancelled/forfeited | (33 | ) |  | $ | 33.31 |
Balance, December 31, 2010 | 360 |  |  | $ | 36.36 |
Granted | — |  |  | $ | — |
Exercises | (6 | ) |  | $ | 27.23 |
Cancelled/forfeited | — |  |  | $ | — |
Balance, December 31, 2011 | 354 |  |  | $ | 36.52 |
Granted | — |  |  | $ | — |
Exercises | (153 | ) |  | $ | 36.80 |
Cancelled/forfeited | — |  |  | $ | — |
Balance, December 31, 2012 | 201 |  |  | $ | 36.30 |
A summary of the status of the Company’s nonvested stock options as of December 31, 2012, and changes during the year ended December 31, 2012 follows:
| Shares |  | Weighted Average Grant Date Fair Value
Nonvested at beginning of year | 103 |  |  | $ | 13.67 |
Granted | — |  |  | — |
Vested | (63 | ) |  | $ | 13.65 |
Cancelled/Forfeited | — |  |  | — |
Nonvested at end of year | 40 |  |  | $ | 13.69 |
Disclosure of share based compensation award activity | In determining the estimated fair value of the Company’s stock options as of the date of grant, the Company used the Black-Scholes option pricing model with the following assumptions:
| 2010
Risk-free interest rate | 1.57 | %
Dividend yield | 1.42 | %
Volatility factors of the expected market price for common stock | 44.35 | %
Weighted average expected life of options | 6.3 years |
The following table summarizes information about stock options outstanding and exercisable as of December 31, 2012 (in thousands, except contractual life and per share data):
| Shares Under Option |  | Remaining Contractual Life |  | Average Exercise Price Per Share |  | Intrinsic Value per Share(1) |  | Aggregate Intrinsic Value
Options exercisable and vested at December 31, 2012 | 161 |  |  | 4.0 |  | $ | 36.57 |  |  | $ | 29.88 |  |  | $ | 4,797 |
Options outstanding and unvested at December 31, 2012 | 40 |  |  | 4.1 |  | $ | 35.24 |  |  | $ | 31.21 |  |  | $ | 1,260 |
(1) | Computed based upon the amount by which the fair market value of the Company’s common stock at December 31, 2012 of $66.45 per share exceeded the weighted average exercise price.

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + 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 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. + Details
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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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