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Net Income Per Share (Tables)
 9 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
Basic and Diluted Net Income Per Share
The basic and diluted net income per share calculations for the three and nine months ended September 30, 2021 and 2020 were as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
(In thousands, except per share data)
Net income$29,317 $8,805 $63,868 $15,817 
Weighted-average shares outstanding – basic43,648 42,802 43,293 42,606 
Effect of dilutive securities from stock award plans2,087 889 2,086 1,045 
Effect of convertible senior notes2,156 — 1,816 — 
Effect of warrants450 — — — 
Weighted-average shares outstanding – diluted48,341 43,691 47,195 43,651 
Net income per share – basic$0.67 $0.21 $1.48 $0.37 
Net income per share – diluted$0.61 $0.20 $1.35 $0.36 
Anti-dilutive weighted-average shares related to stock award plans64 2,328 199 2,076 
Anti-dilutive weighted-average shares related to convertible senior notes and warrants— 11,816 5,908 11,816