Stock Based Compensation (Narrative) (Details)	9 Months Ended
Sep. 30, 2015 shares
Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares surrendered to satisfy tax withholding obligations	9,516

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.

No definition available.

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