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Stock Based Compensation (Unamortized Value Of Awards With Market Conditions) (Details) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011
Relative TSR [Member] | Restricted Share Awards [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unamortized value of shares	$ 894
Relative TSR [Member] | Unrestricted Share Awards [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unamortized value of shares	834
Absolute TSR [Member] | Restricted Share Awards [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unamortized value of shares	306
Absolute TSR [Member] | Unrestricted Share Awards [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unamortized value of shares	$ 286

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Unamortized Value Of Shares

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