Employee Benefit Plans (Other) (Details) (USD $)				12 Months Ended
Feb. 18, 2013	Dec. 31, 2012 Savings Plan 401k [Member]	Dec. 31, 2011 Savings Plan 401k [Member]	Dec. 31, 2012 Deferred Compensation, Share-based Payments [Member]	Dec. 31, 2011 Deferred Compensation, Share-based Payments [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Common stock, shares outstanding	97,856,346	1,069,517	1,236,874
Deferred compensation plan with individual percentage of total shares outstanding		1.20%	1.20%
Deferred compensation plan with individual percentage of salary deferral				80.00%
Plan assets at fair value at year end				$ 29,600,000	$ 28,400,000
Deferred compensation plan, unfunded liability				$ 32,200,000	$ 30,100,000

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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