XML 37 R27.htm IDEA: XBRL DOCUMENT v3.8.0.1
Earnings Per Share (Details Textual) - $ / shares
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 207,000 573,000
Weighted Average Price of Antidilutive Securities Excluded from Computation of Earnings Per Share (in dollars per share) $ 27.94 $ 27.45