The following table presents selected unaudited consolidated financial results for each of the eight quarters in the two-year period ended September 30, 2018. In the opinion of management, this unaudited information has been prepared on the same basis as the audited information and includes all adjustments (consisting of only normal recurring adjustments, except as noted below) necessary for a fair statement of the consolidated financial information for the period presented.



	Quarter Ended
	September 30, 2018		June 30, 2018		March 31, 2018		December 31, 2017
	(In thousands, except per share data)
Revenues	$	279,791	$	259,505	$	257,858	$	235,321
Cost of revenues (1)	79,431		78,390		78,519		74,359
Gross profit	200,360		181,115		179,339		160,962
Net income	$	50,480	$	32,361	$	32,275	$	27,299
Earnings per share (2):
Basic	$	1.74	$	1.09	$	1.08	$	0.91
Diluted	$	1.64	$	1.04	$	1.03	$	0.86
Shares used in computing earnings per share:
Basic	29,077		29,708		29,985		30,078
Diluted	30,702		31,161		31,300		31,561



	Quarter Ended
	September 30, 2017		June 30, 2017		March 31, 2017		December 31, 2016
	(In thousands, except per share data)
Revenues	$	253,205	$	230,986	$	228,378	$	219,600
Cost of revenues (1)	75,202		69,793		72,131		69,997
Gross profit	178,003		161,193		156,247		149,603
Net income	$	40,044	$	25,227	$	25,084	$	37,901
Earnings per share (2):
Basic	$	1.31	$	0.82	$	0.81	$	1.22
Diluted	$	1.25	$	0.78	$	0.78	$	1.16
Shares used in computing earnings per share:
Basic	30,534		30,914		31,017		30,989
Diluted	31,963		32,224		32,260		32,536


(1)	Cost of revenues excludes amortization expense of $0.5 million, $0.6 million, $0.6 million, $0.7 million, $1.4 million, $1.7 million, $1.7 million and $1.7 million for the quarters ended September 30, 2018, June 30, 2018, March 31, 2018, December 31, 2017, September 30, 2017, June 30, 2017, March 31, 2017 and December 31, 2016, respectively.


(2)	Earnings per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the totals for the respective years.