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Earnings per Share (Detail Textuals 1) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Aug. 08, 2017
Aug. 06, 2015
Earnings Per Share [Abstract]        
Antidilutive securities excluded from computation of earnings per share, amount 0 21,621    
Value of shares repurchased through open market transactions     $ 1.5 $ 2.0
Total number of common stock repurchased 92,509      
Average price per share of total common stock repurchased $ 17.80      
Number of common stock repurchased 5,468      
Average price per share of common stock repurchased $ 20.51      
Value remained available for the purchase of shares under the plan $ 1.8