CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 312,414,000	$ 298,504,000
Operating expenses:
Cost of revenues	89,528,000	90,758,000
Research and development	40,651,000	38,943,000
Selling, general and administrative	93,911,000	112,021,000
Amortization of intangible assets	937,000	1,796,000
Restructuring and impairment charges	0	3,104,000
Unallocated gain on sale of product line assets	(7,334,000)	0
Total operating expenses	217,693,000	246,622,000
Operating income	94,721,000	51,882,000
Interest expense, net	(9,641,000)	(9,768,000)
Other income (expense), net	2,880,000	(219,000)
Income before income taxes	87,960,000	41,895,000
Income tax provision (benefit)	1,468,000	(13,026,000)
Net income	86,492,000	54,921,000
Other comprehensive gain:
Foreign currency translation adjustments	17,048,000	14,092,000
Comprehensive income	$ 103,540,000	$ 69,013,000
Earnings per share:
Basic (in dollars per share)	$ 2.97	$ 1.89
Diluted (in dollars per share)	$ 2.90	$ 1.82
Shares used in computing earnings per share:
Basic (in shares)	29,127	29,025
Diluted (in shares)	29,789	30,169
Transactional and Maintenance
Revenues	$ 252,150,000	$ 220,374,000
Technology Service
Revenues	41,425,000	44,025,000
License
Revenues	$ 18,839,000	$ 34,105,000