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Long-term Equity-based Compensation - Schedule of Outstanding Options (Details) (USD $) | 12 Months Ended |
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Dec. 31, 2013 | Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Outstanding Shares Subject to Options | 2,543,673 | 3,192,054
Outstanding Weighted Average Exercise Price | $ 41.38 | $ 40.53
Outstanding Weighted Average Remaining Contractual Life | 3 years 6 months 26 days |
Range of Exercise Prices $10.00 - $15.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 10.00 |
Range of Exercise Prices, Upper Range Limit | $ 15.00 |
Outstanding Shares Subject to Options | 16,750 |
Outstanding Weighted Average Exercise Price | $ 13.55 |
Outstanding Weighted Average Remaining Contractual Life | 5 years 1 month 6 days |
Exercisable Shares Subject to Options | 16,750 |
Exercisable Weighted Average Exercise Price | $ 13.55 |
Range of Exercise Prices $15.01 - $20.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 15.01 |
Range of Exercise Prices, Upper Range Limit | $ 20.00 |
Outstanding Shares Subject to Options | 8,000 |
Outstanding Weighted Average Exercise Price | $ 16.48 |
Outstanding Weighted Average Remaining Contractual Life | 5 years 4 months 6 days |
Exercisable Shares Subject to Options | 8,000 |
Exercisable Weighted Average Exercise Price | $ 16.48 |
Range of Exercise Prices $20.01 - $25.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 20.01 |
Range of Exercise Prices, Upper Range Limit | $ 25.00 |
Outstanding Shares Subject to Options | 38,250 |
Outstanding Weighted Average Exercise Price | $ 23.43 |
Outstanding Weighted Average Remaining Contractual Life | 6 years 0 months 26 days |
Exercisable Shares Subject to Options | 38,250 |
Exercisable Weighted Average Exercise Price | $ 23.43 |
Range of Exercise Prices $25.01 - $30.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 25.01 |
Range of Exercise Prices, Upper Range Limit | $ 30.00 |
Outstanding Shares Subject to Options | 404,000 |
Outstanding Weighted Average Exercise Price | $ 28.87 |
Outstanding Weighted Average Remaining Contractual Life | 7 years 6 months 29 days |
Exercisable Shares Subject to Options | 250,812 |
Exercisable Weighted Average Exercise Price | $ 28.77 |
Range of Exercise Prices $30.01 - $35.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 30.01 |
Range of Exercise Prices, Upper Range Limit | $ 35.00 |
Outstanding Shares Subject to Options | 255,375 |
Outstanding Weighted Average Exercise Price | $ 33.19 |
Outstanding Weighted Average Remaining Contractual Life | 9 years 0 months 29 days |
Exercisable Shares Subject to Options | 91,685 |
Exercisable Weighted Average Exercise Price | $ 32.72 |
Range of Exercise Prices $35.01 - $40.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 35.01 |
Range of Exercise Prices, Upper Range Limit | $ 40.00 |
Outstanding Shares Subject to Options | 314,500 |
Outstanding Weighted Average Exercise Price | $ 37.22 |
Outstanding Weighted Average Remaining Contractual Life | 3 years 11 months 19 days |
Exercisable Shares Subject to Options | 314,500 |
Exercisable Weighted Average Exercise Price | $ 37.22 |
Range of Exercise Prices $40.01 - $45.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 40.01 |
Range of Exercise Prices, Upper Range Limit | $ 45.00 |
Outstanding Shares Subject to Options | 311,868 |
Outstanding Weighted Average Exercise Price | $ 43.57 |
Outstanding Weighted Average Remaining Contractual Life | 0 years 8 months 16 days |
Exercisable Shares Subject to Options | 311,868 |
Exercisable Weighted Average Exercise Price | $ 43.57 |
Range of Exercise Prices $45.01 - $50.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 45.01 |
Range of Exercise Prices, Upper Range Limit | $ 50.00 |
Outstanding Shares Subject to Options | 958,222 |
Outstanding Weighted Average Exercise Price | $ 48.64 |
Outstanding Weighted Average Remaining Contractual Life | 1 year 10 months 6 days |
Exercisable Shares Subject to Options | 958,222 |
Exercisable Weighted Average Exercise Price | $ 48.64 |
Range of Exercise Prices $50.01 - $55.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 50.01 |
Range of Exercise Prices, Upper Range Limit | $ 55.00 |
Outstanding Shares Subject to Options | 236,708 |
Outstanding Weighted Average Exercise Price | $ 50.51 |
Outstanding Weighted Average Remaining Contractual Life | 0 years 4 months 10 days |
Exercisable Shares Subject to Options | 236,708 |
Exercisable Weighted Average Exercise Price | $ 50.51 |
Range of Exercise Prices $10.00 - $55.00 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Range of Exercise Prices, Lower Range Limit | $ 10.00 |
Range of Exercise Prices, Upper Range Limit | $ 55.00 |
Outstanding Shares Subject to Options | 2,543,673 |
Outstanding Weighted Average Exercise Price | $ 41.38 |
Outstanding Weighted Average Remaining Contractual Life | 3 years 6 months 26 days |
Exercisable Shares Subject to Options | 2,226,795 |
Exercisable Weighted Average Exercise Price | $ 42.81 |

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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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