XML 99 R84.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings Per Share (Details) - $ / shares
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Basic average common shares outstanding [1]                 16,464,286.000 17,000,599.000 18,762,451.000
Incremental shares due to:                      
Restricted stock units                 21,522.000 21,668.000 33,128.000
Performance shares                 45,252.000 76,525.000 24,717.000
Incremental Common Shares Attributable to Stock Options                 24,866.000 7,648 0
Diluted average common shares outstanding                 16,555,926 17,106,440 18,820,296
Basic net earnings per common share $ 4.92 $ 0.05 $ 0.49 $ 0.46 $ 0.56 $ 0.05 $ 1.22 $ 1.05 $ 5.91 $ 2.91 $ 2.98
Diluted net earnings per common share $ 4.88 $ 0.05 $ 0.48 $ 0.45 $ 0.56 $ 0.05 $ 1.21 $ 1.05 $ 5.88 $ 2.90 $ 2.97
Anti-dilutive shares excluded from calculation                 499,348.000 220,037.000 331,168.000
[1] Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance. See Note 15, "Equity-Based Compensation Plans" for further discussion.