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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2011
Stock-Based Compensation Plans [Abstract] |
Schedule Of Stock Option Activity |
Stock Options |  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2011 |  |  | 110,900 |  |  | $ | 1.79 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (57,300 | ) |  | $ | 1.50 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2011 |  |  | 53,600 |  |  | $ | 2.09 |  |  |  | 1.29 |  |  | $ | 1,625,995 |
Exercisable at December 31, 2011 |  |  | 53,600 |  |  | $ | 2.09 |  |  |  | 1.29 |  |  | $ | 1,625,995 |
Schedule Of Options Outstanding |
Options Outstanding and Exercisable |
Range of Exercise Prices |  | Number of Shares |  |  | Weighted Avg. Remaining Contractual Life |  |  | Weighted Avg. Exercise Price |
$ 1.22 to $ 1.22 |  |  | 16,000 |  |  |  | 0.97 |  |  | $ | 1.22 |
$ 1.22 to $ 2.43 |  |  | 8,600 |  |  |  | 0.80 |  |  | $ | 1.89 |
$ 2.43 to $ 2.64 |  |  | 29,000 |  |  |  | 1.62 |  |  | $ | 2.64 |
$ 1.22 to $ 2.64 |  |  | 53,600 |  |  |  | 1.29 |  |  | $ | 2.09 |
Schedule Of Non-Vested Restricted Stock Activity |
Non-vested restricted stock |  | Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested January 1, 2011 |  |  | 503,153 |  |  | $ | 26.75 |
Granted |  |  | 258,284 |  |  | $ | 35.27 |
Vested |  |  | (133,392 | ) |  | $ | 26.47 |
Forfeited |  |  | (50,436 | ) |  | $ | 30.46 |
Non-vested at December 31, 2011 |  |  | 577,609 |  |  | $ | 30.30 |
Schedule Of Restricted Stock Granted |
Restricted stock grants |  | 2011 |  |  | 2010 |  |  | 2009 |
Employees |  |  | 246,284 |  |  |  | 228,094 |  |  |  | 196,101 |
Outside directors |  |  | 12,000 |  |  |  | 12,000 |  |  |  | 12,000 |
Total |  |  | 258,284 |  |  |  | 240,094 |  |  |  | 208,101 |
Weighted average grant date fair value |  | $ | 35.27 |  |  | $ | 27.36 |  |  | $ | 26.56 |
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 -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -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 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 Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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 -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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