XML 49 R38.htm IDEA: XBRL DOCUMENT v3.10.0.1
Earnings Per Share (Narrative) (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Minimum exercisable prices (in dollars per share)   $ 6.75 $ 6.75 $ 6.75
Maximum exercisable prices (in dollars per share) $ 10.45 $ 10.45 $ 10.45 $ 10.45
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Common stock options (in shares) 136,500 1,633,375 1,429,500 1,953,375