XML 49 R38.htm IDEA: XBRL DOCUMENT v3.8.0.1
Earnings Per Share: (Details) - shares
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Earnings Per Share:    
Denominator for basic EPS - weighted average common shares 3,847,312 4,167,132
Dilutive shares associated with option plans 277,261 283,363
Denominator for diluted EPS - weighted average common shares and dilutive potential common shares 4,124,573 4,450,495
Options excluded from EPS calculation - anti-dilutive (in shares) 15,929 14,125