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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2013
Stock-Based Compensation [Abstract] |
Schedule of weighted average assumptions used for estimating the grant-date fair value of each option grant | The fair values of options granted during the six months ended June 30, 2013, were established at the date of grant using a Black-Scholes option pricing model with the weighted average assumptions as follows:
|  | Six Months Ended |
|  | June 30 |
|  | 2013 |
Expected dividend yield |  |  | 3.74 | %
Risk-free interest rate |  |  | 1.33 | %
Expected volatility |  |  | 39.11 | %
Expected term (in years) |  |  | 7.5 |
Weighted average fair value of options |  | $ | 9.05 |

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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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