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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2013
Stock-Based Compensation [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of share-based payment awards was estimated using the Black-Scholes option pricing model with the following assumptions and weighted average fair values:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Weighted average fair value of grants |  | $ | 2.50 – 5.87 |  |  | $ | 2.03 |  |  | $ | 1.89 |
Risk-free interest rate |  |  | 1.86 – 2.29 | % |  |  | 2.03 | % |  |  | 2.19 | %
Dividend yield |  |  | 1.76 – 2.11 | % |  |  | 1.24 | % |  |  | 1.32 | %
Expected volatility |  |  | 23.21 – 33.74 | % |  |  | 22.04 | % |  |  | 22.25 | %
Expected life in months |  |  | 69 – 90 |  |  |  | 68 |  |  |  | 65 |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award | Option activity under the principal option plans as of December 31, 2013 and changes during the twelve months ended December 31, 2013 were as follows:
|  | Shares |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term (In Years) |  | Aggregate Intrinsic Value |
Outstanding at December 31, 2012 |  |  | 183,574 |  | $ | 10.04 |  |  |  |  |  |  |
Granted |  |  | 41,639 |  |  | 12.95 |  |  |  |  |  |  |
Exercised |  |  | (2,268) |  |  | 9.14 |  |  |  |  |  |  |
Forfeited/cancelled/expired |  |  | (34,565) |  |  | 10.81 |  |  |  |  |  |  |
Outstanding at December 31, 2013 |  |  | 188,380 |  | $ | 10.55 |  |  | 5.99 |  | $ | 1,546,129 |
Exercisable at December 31, 2013 |  |  | 113,751 |  | $ | 10.14 |  |  | 4.40 |  | $ | 980,102
Schedule of Activity and Changes Under the Principal Option Plan | Changes in options outstanding during the past three years were as follows:
Stock Option Plan |  | Shares |  | Exercise Price Range per Share |
Outstanding, December 31, 2010 (138,898 shares exercisable) |  |  | 198,946 |  |  | $7.67 to $15.73 |
Granted during 2011 |  |  | 27,784 |  | $ | 9.11 |
Exercised during 2011 |  |  | (42,495) |  | $ | 7.71 |
Expired or canceled during 2011 |  |  | (12,857) |  | $ | 10.50 to $15.73 |
Outstanding, December 31, 2011 (105,388 shares exercisable) |  |  | 171,378 |  |  | $7.67 to $15.73 |
Granted during 2012 |  |  | 27,784 |  | $ | 9.64 |
Exercised during 2012 |  |  | (15,588) |  |  | $7.67 to $10.50 |
Expired or canceled during 2012 |  |  | — |  | $ | 0.00 |
Outstanding, December 31, 2012 (117,111 shares exercisable) |  |  | 183,574 |  |  | $7.67 to $15.73 |
Granted during 2013 |  |  | 41,639 |  | $ | 12.52 to $14.24 |
Exercised during 2013 |  |  | (2,268) |  |  | $7.67 to $10.66 |
Expired or canceled or forfeited during 2013 |  |  | (34,565) |  | $ | 7.67 to $15.73 |
Outstanding, December 31, 2013 (113,751 shares exercisable) |  |  | 188,380 |  |  | $7.67 to $15.73

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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 + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + 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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