XML 56 R44.htm IDEA: XBRL DOCUMENT v3.7.0.1
Shareholders' Equity (Common Stock Issued With The Exercise Of Stock Options) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Stockholders' Equity Note [Abstract]    
Shares issued (in shares) 632,041 26,261
Proceeds from the exercise of stock options $ 21.5 $ 0.6
Average exercise price per share (in dollars per share) $ 34.03 $ 22.94