Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted average number of dilutive common shares outstanding during the period. Diluted shares outstanding are calculated by adding to the weighted average shares outstanding any potential dilutive securities outstanding for the period. Potential dilutive securities include stock options, restricted stock units, performance-based stock awards and shares to be purchased under the Company’s employee stock purchase plan. The Company’s basic and diluted net income per share for the three and nine months ended December 31, 2019 and 2018 were as follows (in thousands, except per share data):

	For the Three Months Ended December 31,				For the Nine Months Ended December 31,
Basic Net Income Per Share		2019		2018		2019		2018
Net income	$	69,217	$	44,862	$	171,211	$	185,056

Weighted average shares - basic		45,140		45,046		45,225		44,852

Net income per share - basic	$	1.53	$	1.00	$	3.79	$	4.13

	For the Three Months Ended December 31,				For the Nine Months Ended December 31,
Diluted Net Income Per Share		2019		2018		2019		2018
Net income	$	69,217		44,862		171,211		185,056

Weighted average shares - basic		45,140		45,046		45,225		44,852
Effect of dilutive securities		555		1,090		710		1,295
Weighted average shares - diluted		45,695		46,136		45,935		46,147

Net income per share - diluted	$	1.51	$	0.97	$	3.73	$	4.01

Share-based compensation awards of approximately 0.3 million and 0.2 million shares for the three months ended December 31, 2019, and 2018, respectively, and approximately 0.2 million shares for each of the nine months ended December 31, 2019 and 2018, respectively, were outstanding but were not included in the computation of diluted net income per share because the effect of including such shares would have been anti-dilutive or are contingently issuable upon meeting performance criteria in the periods presented.