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Stock-Based Compensation Plans (Tables) | 6 Months Ended
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Jun. 30, 2012
Stock-Based Compensation Plans [Abstract] |
Weighted-Average Assumptions For The Employee Stock Option Plan |
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2012 | 2011 |  | 2012 | 2011
Dividend Yield |  |  | 2.63% |  | 2.68% |  |  | 2.62% |  | 2.71%
Expected volatility |  |  | 44.51% |  | 40.80% |  |  | 44.29% |  | 40.59%
Risk-free interest rate |  |  | 0.72% |  | 1.62% |  |  | 0.87% |  | 1.93%
Expected term of options (years) |  |  | 4.04 |  | 4.05 |  |  | 4.04 |  | 4.05
Weighted-avg. grant date fair value |  | $ | 5.91 | $ | 8.13 |  | $ | 6.44 | $ | 8.24

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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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