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Net Income Per Share
 9 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Net Income Per Share Net Income Per Share
 
The following table summarizes the computations of basic and diluted net income per share for the three and nine months ended December 31, 2021 and December 31, 2020 (in thousands, except per share amounts):
Three Months Ended
December 31,		Nine Months Ended
December 31,
 2021202020212020
Net income$210,011 $382,523 $536,308 $721,510 
Shares used in net income per share computation:    
Weighted average shares outstanding - basic167,090 169,050 167,953 168,448 
Effect of potentially dilutive equivalent shares2,617 3,537 3,074 2,930 
Weighted average shares outstanding - diluted169,707 172,587 171,027 171,378 
Net income per share:    
Basic$1.26 $2.26 $3.19 $4.28 
Diluted$1.24 $2.22 $3.14 $4.21 
 
Share equivalents attributable to outstanding stock options, restricted stock units ("RSUs") and employee share purchase plans ("ESPP") totaling 0.8 million and 0.3 million for the three months ended December 31, 2021 and 2020, respectively, and 0.9 million and 0.4 million for the nine months ended December 31, 2021 and 2020, respectively, were excluded from the calculation of diluted net income per share because the combined exercise price and average unamortized grant date fair value upon exercise of these options and ESPP rights or vesting of RSUs were greater than the average market price of the Company's shares during the periods presented herein, and therefore their inclusion would have been anti-dilutive. A small number of performance-based awards were not included in the calculation because all necessary conditions had not been satisfied by the end of the respective period, and those shares were not issuable if the end of the reporting period were the end of the performance contingency period.