Share-Based Compensation (Summarized Information Of Stock Options Outstanding) (Details) (USD $)					12 Months Ended					12 Months Ended
Dec. 31, 2011 Incentive Stock Option Plans [Member] years	Dec. 31, 2010 Incentive Stock Option Plans [Member]	Dec. 31, 2009 Incentive Stock Option Plans [Member]	Dec. 31, 2008 Incentive Stock Option Plans [Member]	Dec. 31, 2011 Incentive Stock Option Plans [Member] Range One [Member] years	Dec. 31, 2011 Incentive Stock Option Plans [Member] Range Two [Member] years	Dec. 31, 2011 Incentive Stock Option Plans [Member] Range Three [Member] years	Dec. 31, 2011 Incentive Stock Option Plans [Member] Range Four [Member] years	Dec. 31, 2011 Incentive Stock Option Plans [Member] Range Five [Member] years	Dec. 31, 2011 Non-Qualified Option Plans [Member] years	Dec. 31, 2010 Non-Qualified Option Plans [Member]	Dec. 31, 2009 Non-Qualified Option Plans [Member]	Dec. 31, 2008 Non-Qualified Option Plans [Member]	Dec. 31, 2011 Non-Qualified Option Plans [Member] Range One [Member] years	Dec. 31, 2011 Non-Qualified Option Plans [Member] Range Two [Member] years	Dec. 31, 2011 Non-Qualified Option Plans [Member] Range Three [Member] years	Dec. 31, 2011 Non-Qualified Option Plans [Member] Range Four [Member] years	Dec. 31, 2011 Non-Qualified Option Plans [Member] Range Five [Member] years
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Limit					$ 2.41				$ 13.93									$ 13.93
Exercise Price Range, Upper Limit					$ 2.50				$ 16.11									$ 16.11
Exercise Price Range						$ 3.68	$ 6.07	$ 10.39						$ 2.50	$ 3.68	$ 6.07	$ 10.39
Options Outstanding, Number Outstanding	2,095,000				86,000	191,000	136,000	475,000	1,207,000	817,000				98,000	167,000	164,000	35,000	353,000
Options Outstanding, Average Remaining Contractual Life (in years)	6.48				0.94	1.97	2.99	6.95	7.80	4.69				0.95	1.99	2.99	7.01	7.55
Options Outstanding, Weighted Average Exercise price	$ 11.73	$ 10.24	$ 8.48	$ 7.55	$ 2.45	$ 3.68	$ 6.07	$ 10.39	$ 14.83	$ 9.02	$ 7.04	$ 6.05	$ 5.85	$ 2.50	$ 3.68	$ 6.07	$ 10.39	$ 14.58
Options Exercisable, Number Exercisable	849,000				86,000	191,000	136,000	171,000	265,000	541,000				98,000	167,000	164,000	12,000	100,000
Options Exercisable, Weighted Average Exercise Price	$ 8.53				$ 2.45	$ 3.68	$ 6.07	$ 10.39	$ 14.05	$ 6.26				$ 2.50	$ 3.68	$ 6.07	$ 10.39	$ 14.04

Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range

No definition available.

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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 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.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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- Definition

The weighted average price as of the beginning of the year 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 Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a)

-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

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- Definition

The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

+ References

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-Publisher FASB

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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

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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

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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 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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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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

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