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Net Income Per Share (Tables)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Reconciliation of Weighted Average Common Shares Outstanding
A reconciliation of weighted average shares outstanding used to calculate basic and diluted net income per share follows (in thousands, except per share data):
Three months ended March 31
 20212020
Weighted average shares outstanding (basic)162,441 163,475 
Impact of common stock equivalents1,296 942 
Weighted average shares outstanding (diluted)163,737 164,417 
Per share:
Basic$0.43 $0.16 
Diluted0.43 0.16