Share Based Compensation (Narrative) (Details) (Detail) (USD $)	9 Months Ended
Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonqualified stock options, aggregate shares	313
Exercise price	$ 9.89

Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Prices

No definition available.

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