Share Based Compensation (Details 3) (USD $)	12 Months Ended
Dec. 31, 2013
Range 3 [Member]
Stock Options Outstanding Summary [Line Items]
Exercise Price, Lower Range Limit	$ 16.97
Exercise Price, Upper Range Limit	$ 16.97
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Number Outstanding	39,000
Weighted Average Remaining Contractual Life	0 years 3 months 25 days
Weighted Average Exercise Price	$ 16.97
Aggregate Intrinsic Value	$ 184,000
Range 4 [Member]
Stock Options Outstanding Summary [Line Items]
Exercise Price, Lower Range Limit	$ 25.68
Exercise Price, Upper Range Limit	$ 55.58
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Number Outstanding	566,000
Weighted Average Remaining Contractual Life	1 year 7 months 6 days
Weighted Average Exercise Price	$ 38.68
Aggregate Intrinsic Value	0
Range 5 [Member]
Stock Options Outstanding Summary [Line Items]
Exercise Price, Lower Range Limit	$ 50.15
Exercise Price, Upper Range Limit	$ 65.04
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Number Outstanding	143,000
Weighted Average Remaining Contractual Life	2 years 6 months 4 days
Weighted Average Exercise Price	$ 57.76
Aggregate Intrinsic Value	0
Range 6 [Member]
Stock Options Outstanding Summary [Line Items]
Exercise Price, Lower Range Limit	$ 49.05
Exercise Price, Upper Range Limit	$ 62.23
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Number Outstanding	318,000
Weighted Average Remaining Contractual Life	3 years 3 months 7 days
Weighted Average Exercise Price	$ 53.49
Aggregate Intrinsic Value	0
Range 7 [Member]
Stock Options Outstanding Summary [Line Items]
Exercise Price, Lower Range Limit	$ 51.14
Exercise Price, Upper Range Limit	$ 98.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Number Outstanding	180,000
Weighted Average Remaining Contractual Life	4 years 5 months 5 days
Weighted Average Exercise Price	$ 70.08
Aggregate Intrinsic Value	$ 0

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest 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

-Subparagraph (e)(1)

-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.

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- Definition

As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

+ References

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- Definition

As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

+ References

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- Definition

Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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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

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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

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