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Equity Incentive Plan Details 1 (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 1,871,694 | 2,104,775
Options, Outstanding, Weighted Average Exercise Price | $ 112.57 | $ 94.45
Options, Outstanding, Weighted Average Remaining Contractual Term | 5 years 6 months 18 days |
Options, Exercisable, Number | 1,377,919 |
$0.0-$50.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 84,157 |
Options, Outstanding, Weighted Average Exercise Price | $ 46.32 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 1 year |
Options, Exercisable, Number | 84,157 |
$50.0-$70.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 339,250 |
Options, Outstanding, Weighted Average Exercise Price | $ 61.57 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 2 years 9 months 18 days |
Options, Exercisable, Number | 339,250 |
$70.0-$100.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 472,789 |
Options, Outstanding, Weighted Average Exercise Price | $ 81.31 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 5 years 3 months 18 days |
Options, Exercisable, Number | 433,569 |
$100.0-$125.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 298,050 |
Options, Outstanding, Weighted Average Exercise Price | $ 108.90 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 3 years 10 months 24 days |
Options, Exercisable, Number | 298,050 |
$125.0-$150.0 Range of Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 359,084 |
Options, Outstanding, Weighted Average Exercise Price | $ 141.51 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 7 years 3 months 18 days |
Options, Exercisable, Number | 181,965 |
Greater than $150.0 Exercise Price |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Options, Outstanding, Number | 318,364 |
Options, Outstanding, Weighted Average Exercise Price | $ 201.64 |
Options, Outstanding, Weighted Average Remaining Contractual Term | 9 years 3 months 18 days |
Options, Exercisable, Number | 40,928 |

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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 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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