v2.4.0.6

Stock-Based Compensation Plans (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Stock Options |  |  |
Stock-Based Compensation Plans |  |  |
Intrinsic value of options exercised | $ 26,746,000 | $ 46,126,000 | $ 30,811,000
2009 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 307,554 |  |
Options outstanding intrinsic value | 7,049,000 |  |
Options exercisable intrinsic value | 2,845,000 |  |
Options exercisable weighted average contractual life | 8 years 3 months 18 days |  |
1994 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 719,830 |  |
Options outstanding intrinsic value | 21,730,000 |  |
Options exercisable intrinsic value | $ 21,730,000 |  |
Options exercisable weighted average contractual life | 4 years 1 month 6 days |  |
30.00 - 39.99 | 1994 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 1,424 |  |
Exercise Price (Lower range of limit) | $ 30.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 39.99 |  |
Weighted Average Remaining Contractual Term | 1 month 6 days |  |
40.00 - 49.99 | 1994 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 94,898 |  |
Exercise Price (Lower range of limit) | $ 40.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 49.99 |  |
Weighted Average Remaining Contractual Term | 3 years 6 months |  |
60.00 - 69.99 | 1994 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 41,556 |  |
Exercise Price (Lower range of limit) | $ 60.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 69.99 |  |
Weighted Average Remaining Contractual Term | 2 years 1 month 6 days |  |
70.00 - 79.99 | 2009 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 69,287 |  |
Exercise Price (Lower range of limit) | $ 70.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 79.99 |  |
Weighted Average Remaining Contractual Term | 7 years 1 month 6 days |  |
70.00 - 79.99 | 1994 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 730 |  |
Exercise Price (Lower range of limit) | $ 70.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 79.99 |  |
Weighted Average Remaining Contractual Term | 2 years 6 months |  |
80.00 - 89.99 | 1994 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 107,833 |  |
Exercise Price (Lower range of limit) | $ 80.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 89.99 |  |
Weighted Average Remaining Contractual Term | 5 years 1 month 6 days |  |
90.00 - 99.99 | 1994 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 187,380 |  |
Exercise Price (Lower range of limit) | $ 90.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 99.99 |  |
Weighted Average Remaining Contractual Term | 3 years 1 month 6 days |  |
110.00 - 119.99 | 2009 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 127,930 |  |
Exercise Price (Lower range of limit) | $ 110.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 119.99 |  |
Weighted Average Remaining Contractual Term | 8 years 1 month 6 days |  |
130.00 - 139.99 | 2009 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 108,838 |  |
Exercise Price (Lower range of limit) | $ 130.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 139.99 |  |
Weighted Average Remaining Contractual Term | 9 years 6 months |  |
140.00 - 149.99 | 2009 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 1,499 |  |
Exercise Price (Lower range of limit) | $ 140.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 149.99 |  |
Weighted Average Remaining Contractual Term | 9 years 1 month 6 days |  |
140.00 - 149.99 | 1994 Plan |  |  |
Stock-Based Compensation Plans |  |  |
Number of Options (in shares) | 286,009 |  |
Exercise Price (Lower range of limit) | $ 140.00 |  |
Exercise Price, upper limit (in dollars per share) | $ 149.99 |  |
Weighted Average Remaining Contractual Term | 4 years 1 month 6 days |  |

X
- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(2) -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. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding. + 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 Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(1) -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. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(2) -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. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 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 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
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + 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)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a, b) -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. + Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining contractual term of outstanding stock options, 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
Name: | us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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 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 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
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration