Year Ended December 31, | ||||||||||||
2019 | 2018 | 2017 | ||||||||||
Basic: | ||||||||||||
Net income | $ | 184,443 | $ | 18,343 | $ | 169,459 | ||||||
Weighted average number of common shares during the period | 41,738 | 41,570 | 41,365 | |||||||||
Net income per share - basic | $ | 4.42 | $ | 0.44 | $ | 4.10 | ||||||
Diluted: | ||||||||||||
Net income | $ | 184,443 | $ | 18,343 | $ | 169,459 | ||||||
Weighted average number of common shares during the period | 41,738 | 41,570 | 41,365 | |||||||||
Weighted average number of common equivalent shares to reflect the dilutive effect of common stock equivalent securities: | ||||||||||||
Stock options | 79 | 100 | 112 | |||||||||
Common stock units related to deferred compensation for employees | — | 25 | 25 | |||||||||
Restricted common stock units related to incentive compensation | 132 | 199 | 63 | |||||||||
Total common and common equivalent shares adjusted to calculate diluted earnings per share | 41,949 | 41,894 | 41,565 | |||||||||
Net income per share – diluted | $ | 4.40 | $ | 0.44 | $ | 4.08 | ||||||
Percentage of dilution compared to basic net income per share | 0.5 | % | — | % | 0.5 | % | ||||||