CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues	$ 313,731	$ 314,249	$ 920,206	$ 854,739
Operating expenses:
Cost of revenues	88,569	87,215	267,466	248,849
Research and development	41,411	36,972	119,793	110,082
Selling, general and administrative	99,832	102,906	315,318	308,094
Amortization of intangible assets	1,048	1,448	4,046	4,453
Restructuring and acquisition-related	0	0	3,104	0
Total operating expenses	230,860	228,541	709,727	671,478
Operating income	82,871	85,708	210,479	183,261
Interest expense, net	(11,223)	(10,111)	(32,245)	(29,795)
Other income, net	4,560	2,457	2,333	1,718
Income before income taxes	76,208	78,054	180,567	155,184
Income tax provision	12,132	13,902	3,282	17,644
Net income	64,076	64,152	177,285	137,540
Other comprehensive gain (loss):
Foreign currency translation adjustments	832	(4,189)	(4,132)	(4,529)
Comprehensive income	$ 64,908	$ 59,963	$ 173,153	$ 133,011
Earnings per share:
Basic (in dollars per share)	$ 2.21	$ 2.21	$ 6.10	$ 4.74
Diluted (in dollars per share)	$ 2.15	$ 2.12	$ 5.92	$ 4.54
Shares used in computing earnings per share:
Basic (in shares)	29,005	28,967	29,075	29,000
Diluted (in shares)	29,744	30,292	29,966	30,295
Transactional and Maintenance
Revenues	$ 246,829	$ 226,040	$ 707,905	$ 632,012
Technology Service
Revenues	43,633	44,594	135,563	135,957
License
Revenues	$ 23,269	$ 43,615	$ 76,738	$ 86,770