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Share-Based Compensation (Stock Option Awards) (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Options Outstanding, Number of Options | 433,750 | 451,025
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years) | 4 years 2 months 12 days |
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share) | $ 49.11 | $ 47.22
Options Exercisable, Number of Options | 353,750 |
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share) | $ 50.37 |
$33.61-40.53 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Range of Exercise Prices, lower limit (in dollars per share) | $ 33.61 |
Range of Exercise Prices, upper limit (in dollars per share) | $ 45.30 |
Options Outstanding, Number of Options | 125,250 |
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years) | 8 years |
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share) | $ 40.36 |
Options Exercisable, Number of Options | 45,250 |
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share) | $ 34.76 |
$47.61-51.51 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Range of Exercise Prices, lower limit (in dollars per share) | $ 47.61 |
Range of Exercise Prices, upper limit (in dollars per share) | $ 51.51 |
Options Outstanding, Number of Options | 161,000 |
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years) | 3 years 7 months 6 days |
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share) | $ 49.70 |
Options Exercisable, Number of Options | 161,000 |
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share) | $ 49.70 |
$52.13-58.83 [Member] |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |
Range of Exercise Prices, lower limit (in dollars per share) | $ 52.13 |
Range of Exercise Prices, upper limit (in dollars per share) | $ 58.83 |
Options Outstanding, Number of Options | 147,500 |
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years) | 1 year 10 months 24 days |
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share) | $ 55.88 |
Options Exercisable, Number of Options | 147,500 |
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share) | $ 55.88 |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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