Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Jan. 31, 2021

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Information

Selected summarized quarterly financial information for fiscal years ended January 31, 2021 and 2020 is as follows (in thousands, except per share data):

	Three months ended
	January 31,		October 31,		July 31,		April 30,		January 31,		October 31,		July 31,		April 30,
	2021		2020		2020		2020		2020		2019		2019		2019
Consolidated Statements of Income Data:
Revenues	$	396,761	$	377,519	$	353,683	$	337,106	$	311,508	$	280,921	$	266,900	$	244,752
Gross profit	282,914		274,522		256,479		242,226		217,189		207,592		196,682		179,249
Operating income	98,843		101,305		90,081		87,565		60,394		80,800		73,856		71,169
Net income	102,918		96,959		93,551		86,570		66,182		82,245		79,242		73,449
Net income per share:
Basic	$	0.68	$	0.64	$	0.62	$	0.58	$	0.44	$	0.56	$	0.54	$	0.50
Diluted	$	0.64	$	0.60	$	0.58	$	0.54	$	0.42	$	0.52	$	0.50	$	0.47