Closing Stock Price, Per Share

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, New Employees, Award Vesting Rights, After First Year, Quarterly Percentage

+ References

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, New Employees, Award Vesting Rights, First Year Percentage

+ References

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Current Employees, Award Vesting Rights, After Third Year, Quarterly Percentage

+ References

No definition available.

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- Definition

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range if Voting Rights Held Above Benchmark, Lower Range Limit, Percent

+ References

No definition available.

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- Definition

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit, Percent

+ References

No definition available.

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- Definition

Share-based Compensation, Shares Authorized under Stock Option Plans, Voting Rights Held Benchmark, Percent

+ References

No definition available.

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- Definition

Face amount or stated value of common stock per share; generally not indicative of the fair market value per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

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-Topic 210

-SubTopic 10

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

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-Name Regulation S-X (SX)

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-Section 02

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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-Paragraph 2

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 3, 4, 5, 6, 7, 8

-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 AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-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 SEC

-Name Regulation S-X (SX)

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-Topic 210

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-Section S99

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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29

-Article 5

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- 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

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-Topic 718

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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-Name Accounting Standards Codification

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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

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Stock, Stock Options and Rights Narrative (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	600,000,000	600,000,000
Common stock, par value	$ 0.001	$ 0.001
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	$ 2,758	$ 18,263	$ 27,539
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	10,766	8,499
Closing Stock Price, Per Share	$ 4.83	$ 4.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	11,176	13,519	166,360
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 39,022
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	26 months
1996 Stock Incentive Program(1)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Term of Award	P10Y
2008 Inducement Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Term of Award	P10Y
2012 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Term of Award	P10Y
2012 Incentive Plan \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
2012 Incentive Plan \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
2012 Incentive Plan \| Sitting Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Term of Award	P5Y
2012 Incentive Plan \| Newly Elected Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Term of Award	P10Y
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, First Year Percentage	25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, After First Year, Quarterly Percentage	6.25%
Share-based Compensation Arrangement by Share-based Payment Award, Current Employees, Award Vesting Rights, After Third Year, Quarterly Percentage	25.00%
Stock Options [Member] \| 1996 Stock Incentive Program(1)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit, Percent	100.00%
Share-based Compensation, Shares Authorized under Stock Option Plans, Voting Rights Held Benchmark, Percent	10.00%
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range if Voting Rights Held Above Benchmark, Lower Range Limit, Percent	110.00%
Stock Options [Member] \| 2008 Inducement Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit, Percent	100.00%
Stock Options [Member] \| 2009 Incentive Plan(1)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit, Percent	100.00%
Stock Options [Member] \| 2012 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit, Percent	100.00%