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Incentive Plans (Schedule Of Employee Stock Purchase Plan) (Details) (Employee Stock Purchase Plan [Member])	12 Months Ended
	Dec. 31, 2011
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved and authorized shares	750,000
Shares issued	(625,003)
Shares available for future issuance	124,997

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

The number of shares newly issued during the reporting period under the plan.

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