Share-Based Compensation Stock Option Activity (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning, options	7,960,170	7,883,805	7,704,997
Granted, options	1,494,250	2,165,056	1,528,990
Exercised, options	(415,156)	(1,246,435)	(785,633)
Canceled, options	(882,995)	(842,256)	(564,549)
Outstanding, ending, options	8,156,269	7,960,170	7,883,805	7,704,997
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning, weighted average exercise price	$ 10.26	$ 9.65	$ 9.41
Granted, weighted average exercise price	$ 10.13	$ 12.14	$ 10.36
Exercised, weighted average exercise price	$ 7.91	$ 9.39	$ 8.13
Canceled, weighted average exercise price	$ 11.22	$ 10.64	$ 10.84
Outstanding, ending, weighted average exercise price	$ 10.25	$ 10.26	$ 9.65	$ 9.41
Exercisable, options	4,068,071	3,366,610	3,430,038	3,170,359
Exercisable, options, weighted average exercise price	$ 9.98	$ 10.31	$ 10.74	$ 11.18
Exercisable, options, weighted average remaining contractual life	4 years 2 months 12 days	4 years 3 months 18 days	4 years 8 months 12 days	4 years 9 months 18 days
Options exercisable and expected to vest	6,900,000
Weighted average remaining contractual life of options exercisable and expected to vest	5 years 10 months 24 days
Estimated intrinsic value of options exercisable and expected to vest	$ 4,300,000
Weighted average fair values of options granted	$ 2.96	$ 4.36	$ 4.07
Aggregate intrinsic value of options exercised	1,000,000	4,600,000	2,400,000
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	3,300,000	11,700,000	6,500,000
Net tax benefit realized from exercise of non-qualified stock options and disqualifying dispositions of incentive stock options	218,000	477,000	211,000
Common stock closing price	$ 9.50
Intrinsic value of outstanding options	4,700,000
Intrinsic value of exercisable options	$ 3,300,000
2012 Equity Incentive Award Plan [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of stock option grant	10 years
Annual Vesting Percentage [Member] \| 2012 Equity Incentive Award Plan [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%

Percentage of vesting of share-based compensation awards.

No definition available.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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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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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.

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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.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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For presentations that combine terminations, 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 or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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

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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

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The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date.

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

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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Price of a single share of a number of saleable stocks of a company.

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

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