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Earnings per Share (Detail Textuals) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Aug. 06, 2015
Class of Stock [Line Items]        
Number of common stock repurchased 41,738 2,155 0  
Repurchase Program        
Class of Stock [Line Items]        
Share repurchase plan, Authorized amount       $ 2.0
Number of common stock repurchased 41,738 2,155    
Average price per share of common stock repurchased $ 14.92 $ 15.39