Supplementary Financial Data (Unaudited) (Tables)

12 Months Ended

Sep. 30, 2019

Quarterly Financial Information Disclosure [Abstract]

Selected Unaudited Consolidated Financial Results

The following table presents selected unaudited consolidated financial results for each of the eight quarters in the two-year period ended September 30, 2019. 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, 2019		June 30, 2019		March 31, 2019		December 31, 2018
	(In thousands, except per share data)
Revenues	$	305,344	$	314,249	$	278,234	$	262,256
Cost of revenues (1)	87,996		87,215		85,568		76,066
Gross profit	217,348		227,034		192,666		186,190
Net income	$	54,584	$	64,152	$	33,381	$	40,007
Earnings per share (2):
Basic	$	1.89	$	2.21	$	1.15	$	1.38
Diluted	$	1.80	$	2.12	$	1.10	$	1.32
Shares used in computing earnings per share:
Basic	28,918		28,967		29,074		28,961
Diluted	30,290		30,292		30,259		30,336

	Quarter Ended
	September 30, 2018		June 30, 2018		March 31, 2018		December 31, 2017
	As Adjusted		As Adjusted		As Adjusted		As Adjusted
	(In thousands, except per share data)
Revenues	$	256,532	$	254,993	$	256,260	$	232,361
Cost of revenues (1)	79,962		79,011		79,493		74,432
Gross profit	176,570		175,982		176,767		157,929
Net income	$	32,713	$	29,721	$	31,169	$	32,879
Earnings per share (2):
Basic	$	1.13	$	1.00	$	1.04	$	1.09
Diluted	$	1.07	$	0.95	$	1.00	$	1.04
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

(1) Cost of revenues excludes amortization expense of $0.5 million, $0.5 million, $0.5 million, $0.5 million, $0.5 million, $0.6 million, $0.6 million and $0.7 million for the quarters ended September 30, 2019, June 30, 2019, March 31, 2019, December 31, 2018, September 30, 2018, June 30, 2018, March 31, 2018 and December 31, 2017, 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.