Year Ended December 31, | ||||||||||||
2018 | 2017 | 2016 | ||||||||||
Basic: | ||||||||||||
Net income | $ | 18,343 | $ | 169,459 | $ | 83,765 | ||||||
Weighted average number of common shares during the period | 41,570 | 41,365 | 41,158 | |||||||||
Net income per share - basic | $ | 0.44 | $ | 4.10 | $ | 2.04 | ||||||
Diluted: | ||||||||||||
Net income | $ | 18,343 | $ | 169,459 | $ | 83,765 | ||||||
Weighted average number of common shares during the period | 41,570 | 41,365 | 41,158 | |||||||||
Weighted average number of common equivalent shares to reflect the dilutive effect of common stock equivalent securities: | ||||||||||||
Stock options | 100 | 112 | 100 | |||||||||
Common stock units related to deferred compensation for employees | 25 | 25 | 52 | |||||||||
Restricted common stock units related to incentive compensation | 199 | 63 | 166 | |||||||||
Total common and common equivalent shares adjusted to calculate diluted earnings per share | 41,894 | 41,565 | 41,476 | |||||||||
Net income per share – diluted | $ | 0.44 | $ | 4.08 | $ | 2.02 | ||||||
Percentage of dilution compared to basic net income per share | — | % | 0.5 | % | 1.0 | % | ||||||