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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Schedule of Stock Option Activity | The following table summarizes the stock option activity for the year ended December 31, 2013:
Stock Options |  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2013 |  |  | 16,500 |  |  | $ | 2.51 |  |  |  | 0.57 |  |  | $ | 513,004 |
Options exercised |  |  | (16,500 | ) |  | $ | 2.51 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2013 |  |  | — |  |  | $ | — |  |  |  | 0.0 |  |  | $ | — |
Exercisable at December 31, 2013 |  |  | — |  |  | $ | — |  |  |  | 0.0 |  |  | $ | — |
Schedule of Non-Vested Restricted Stock Activity | The following table summarizes the non-vested restricted stock activity for the year ended December 31, 2013:
Non-vested restricted stock |  | Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested January 1, 2013 |  |  | 686,778 |  |  | $ | 31.50 |
Granted |  |  | 300,900 |  |  | $ | 34.64 |
Vested |  |  | (216,376 | ) |  | $ | 30.20 |
Forfeited |  |  | (9,600 | ) |  | $ | 33.03 |
Non-vested at December 31, 2013 |  |  | 761,702 |  |  | $ | 33.09 |
Schedule of Restricted Stock Granted | The following table summarizes the restricted stock granted during the respective years:
Restricted stock grants |  | 2013 |  |  | 2012 |  |  | 2011 |
Employees |  |  | 280,900 |  |  |  | 276,017 |  |  |  | 246,284 |
Outside directors |  |  | 20,000 |  |  |  | 20,000 |  |  |  | 12,000 |
Total |  |  | 300,900 |  |  |  | 296,017 |  |  |  | 258,284 |
Weighted average grant date fair value |  | $ | 34.64 |  |  | $ | 32.62 |  |  | $ | 35.27 |
Vesting period |  |  | 3-5 years |  |  |  | 3-5 years |  |  |  | 3-5 years |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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 Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + 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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