Stock-based Compensation Plans (Details 1) (USD $)	12 Months Ended
Dec. 31, 2012
Share Based Compensation Arrangement by Share Based Payment Award Options [Abstract]
Options outstanding, Beginning Balance	1,446,860
Options outstanding, Weighted Average Exercise Price, Beginning Balance	$ 19.52
Options, Exercised	(5,250)
Options, exercised, weighted average price	$ 15.37
Options, forfeited or expired	(650,170)
Options, forfeited or expired, weighted average price, canceled	$ 22.68
Options outstanding, Ending Balance	791,440
Options outstanding, Weighted Average Exercise Price, Ending Balance	$ 16.95
Options, Exercisable	791,440
Options exercisable, Weighted Average Exercise Price	$ 16.95

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Share based compensation arrangement by share based payment award options forfeiture in period weighted average exercise price.

+ References

No definition available.

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c), d(2)

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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

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-Subparagraph b(1)(c)

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- Definition

The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(e)

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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-Publisher FASB

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-Number 123R

-Paragraph A240

-Subparagraph b(1)(f)

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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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.

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Number of share options (or share units) exercised during the current period.

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