Annual report pursuant to Section 13 and 15(d)

Per Share Data (Narrative) (Details)

v3.19.1
Per Share Data (Narrative) (Details) - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Earnings Per Share [Abstract]      
Antidilutive securities excluded from computation of earnings per share, amount (in shares) 25,107,164 32,501,007 41,191,772