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Weighted-Average Shares Used In Computing Earnings Per Common Share Narrative (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Earnings Per Share [Abstract]        
Equity-based awards excluded (in shares) 200,000 300,000 0 400,000