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Share Based Compensation Plans (Details 2) (Stock Options [Member], USD $) | 12 Months Ended
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Dec. 31, 2012
Summary of information about options outstanding |
Number Outstanding | 1,001,241
Number Exercisable and Fully Vested | 172,122
$ 0 - $ 5 [Member] |
Summary of information about options outstanding |
Range of Exercise Price, Lower Range Limit | $ 0
Range of Exercise Price, Upper Range Limit | $ 5
Number Outstanding | 561,811
Weighted Average Remaining Life in Years | 7 years 4 days
Weighted Average Exercise Price | $ 0.59
Number Exercisable and Fully Vested | 128,617
Weighted Average Remaining Life in Years | 6 years 15 days
Weighted Average Exercise Price | $ 0.69
$ 5 - $10 [Member] |
Summary of information about options outstanding |
Range of Exercise Price, Lower Range Limit | $ 5
Range of Exercise Price, Upper Range Limit | $ 10
Number Outstanding | 20,654
Weighted Average Remaining Life in Years | 2 years 8 months 16 days
Weighted Average Exercise Price | $ 9.93
Number Exercisable and Fully Vested | 20,654
Weighted Average Remaining Life in Years | 2 years 8 months 16 days
Weighted Average Exercise Price | $ 9.93
$10 - $15 [Member] |
Summary of information about options outstanding |
Range of Exercise Price, Lower Range Limit | $ 10
Range of Exercise Price, Upper Range Limit | $ 15
Number Outstanding | 355,233
Weighted Average Remaining Life in Years | 2 years 2 months 1 day
Weighted Average Exercise Price | $ 11.27
Number Exercisable and Fully Vested | 0
Weighted Average Remaining Life in Years | 0 years
Weighted Average Exercise Price | $ 0.00
$20 - $25 [Member] |
Summary of information about options outstanding |
Range of Exercise Price, Lower Range Limit | $ 20
Range of Exercise Price, Upper Range Limit | $ 25
Number Outstanding | 11,185
Weighted Average Remaining Life in Years | 5 years 2 months 5 days
Weighted Average Exercise Price | $ 20.57
Number Exercisable and Fully Vested | 11,185
Weighted Average Remaining Life in Years | 5 years 2 months 5 days
Weighted Average Exercise Price | $ 20.57
$25 - $30 [Member] |
Summary of information about options outstanding |
Range of Exercise Price, Lower Range Limit | $ 25
Range of Exercise Price, Upper Range Limit | $ 30
Number Outstanding | 50,978
Weighted Average Remaining Life in Years | 7 years 10 months 2 days
Weighted Average Exercise Price | $ 28.59
Number Exercisable and Fully Vested | 11,666
Weighted Average Remaining Life in Years | 4 years 1 month 21 days
Weighted Average Exercise Price | $ 27.09
$30 - $35 [Member] |
Summary of information about options outstanding |
Range of Exercise Price, Lower Range Limit | $ 30
Range of Exercise Price, Upper Range Limit | $ 35
Number Outstanding | 1,380
Weighted Average Remaining Life in Years | 8 years 4 months 13 days
Weighted Average Exercise Price | $ 32.60
Number Exercisable and Fully Vested | 0
Weighted Average Remaining Life in Years | 0 years
Weighted Average Exercise Price | $ 0.00

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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and 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 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of exercisable 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)(2) -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 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
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c) -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 (c)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- 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
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are 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 + 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 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
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