Three Months Ended September 30, | Nine Months Ended September 30, | |||||||||||||||
2019 | 2018 | 2019 | 2018 | |||||||||||||
Basic: | ||||||||||||||||
Net income | $ | 25,454 | $ | 12,528 | $ | 151,442 | $ | 38,600 | ||||||||
Weighted average number of common shares during the period (in thousands) | 41,785 | 41,683 | 41,715 | 41,586 | ||||||||||||
Net income per share – basic | $ | 0.61 | $ | 0.30 | $ | 3.63 | $ | 0.93 | ||||||||
Diluted: | ||||||||||||||||
Net income | $ | 25,454 | $ | 12,528 | $ | 151,442 | $ | 38,600 | ||||||||
Weighted average number of common shares during the period | 41,785 | 41,683 | 41,715 | 41,586 | ||||||||||||
Weighted average number of common equivalent shares to reflect the dilutive effect of common stock equivalent securities: | ||||||||||||||||
Stock options | 100 | 116 | 80 | 108 | ||||||||||||
Common stock units related to deferred compensation for employees | — | 25 | — | 25 | ||||||||||||
Restricted common stock units related to incentive compensation | 145 | 26 | 116 | 8 | ||||||||||||
Total common and common equivalent shares adjusted to calculate diluted earnings per share | 42,030 | 41,850 | 41,911 | 41,727 | ||||||||||||
Net income per share – diluted | $ | 0.60 | $ | 0.30 | $ | 3.61 | $ | 0.93 | ||||||||