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Equity (Tables) | 12 Months Ended
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Dec. 31, 2013
Equity [Abstract] |
Schedule of Nonvested Option Activity |
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Nonvested options - beginning of year |  |  | 346,075 |  |  | $ | 5.02 |
Nonvested options granted |  |  | 136,350 |  |  | $ | 9.20 |
Nonvested options vested or forfeited |  |  | (114,955 | ) |  | $ | 4.67 |
Nonvested options - end of year |  |  | 367,470 |  |  | $ | 6.68 |
Schedule of Stock Option Activity |
|  | Year ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | Options |  |  | Weighted Average Exercise Price |  |  | Options |  |  | Weighted Average Exercise Price |  |  | Options |  |  | Weighted Average Exercise Price |
Shares under option - beginning of year |  |  | 716,235 |  |  | $ | 14.41 |  |  |  | 823,275 |  |  | $ | 13.20 |  |  |  | 807,620 |  |  | $ | 12.78 |
Options granted |  |  | 136,350 |  |  |  | 34.84 |  |  |  | 128,850 |  |  |  | 19.25 |  |  |  | 118,900 |  |  |  | 15.66 |
Options exercised |  |  | (204,240 | ) |  |  | 11.68 |  |  |  | (226,160 | ) |  |  | 12.72 |  |  |  | (95,625 | ) |  |  | 12.66 |
Options cancelled |  |  | (4,750 | ) |  |  | 17.47 |  |  |  | (9,730 | ) |  |  | 15.37 |  |  |  | (7,620 | ) |  |  | 14.37 |
Shares under option - end of year |  |  | 643,595 |  |  |  | 19.58 |  |  |  | 716,235 |  |  |  | 14.41 |  |  |  | 823,275 |  |  |  | 13.20 |
Summary of Options Exercised |
|  | Year Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Cash proceeds from stock options exercised |  | $ | 1,668 |  |  | $ | 1,305 |  |  | $ | 1,210 |
Tax benefits |  | $ | 700 |  |  | $ | 100 |  |  | $ | - |
Intrinsic value of stock options exercised |  | $ | 4,088 |  |  | $ | 1,359 |  |  | $ | 720 |
Schedule of Assumptions Used to Estimate Fair Value of Stock Options |
|  | Year Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Weighted-average expected stock-price volatility |  |  | 37 | % |  |  | 38 | % |  |  | 40 | %
Weighted-average expected option life |  |  | 5.0 years |  |  |  | 5.0 years |  |  |  | 4.5 years |
Weighted-average risk-free interest rate |  |  | 1.7 | % |  |  | 0.7 | % |  |  | 0.9 | %
Weighted-average dividend yield |  |  | 2.7 | % |  |  | 1.7 | % |  |  | 1.7 | %
Schedule of Information about Options Outstanding and Exercisable by Exercise Price |
|  |  |  |  | Options outstanding |  |  |
|  | Number |  |  | weighted average remaining |  | Options |
Exercise prices |  | outstanding |  |  | contractual life |  | exercisable |
$6.15 - $6.93 |  |  | 47,930 |  |  | 0.99 years |  |  | 47,930 |
$11.30 - $11.41 |  |  | 39,225 |  |  | 0.12 years |  |  | 39,225 |
$12.14 |  |  | 78,120 |  |  | 2.00 years |  |  | 60,010 |
$13.45 |  |  | 3,000 |  |  | 1.08 years |  |  | 1,875 |
$15.59 - $15.62 |  |  | 113,010 |  |  | 3.90 years |  |  | 44,550 |
$17.07 - $17.94 |  |  | 6,750 |  |  | 2.68 years |  |  | 1,625 |
$19.03 - $19.33 |  |  | 219,210 |  |  | 4.11 years |  |  | 80,910 |
$21.76 |  |  | 5,000 |  |  | 4.09 years |  |  | - |
$22.20 |  |  | 4,000 |  |  | 5.09 years |  |  | - |
$35.75 |  |  | 127,350 |  |  | 6.00 years |  |  | - |
Totals |  |  | 643,595 |  |  | 3.69 Years |  |  | 276,125 |

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- Definition Tabular disclosure of the amount of cash proceeds received from the exercise of stock options and similar instruments granted under share-based payment arrangements and the tax benefit realized from stock options exercised during the period. Disclosure may also include the intrinsic value of stock options exercised during the period. + 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 (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: 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 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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