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Earnings Per Share (Narrative) (Detail) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Anti-dilutive options   3,813    
Stock Options [Member]        
Anti-dilutive options 0 3,813 214 6,780
Restricted Stock [Member]        
Anti-dilutive options 43   297