CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues		$ 314,249	$ 254,993	$ 854,739	$ 743,614
Operating expenses:
Cost of revenues	[1]	87,215	79,011	248,849	232,936
Research and development		36,972	32,483	110,082	93,976
Selling, general and administrative	[1]	102,906	97,391	308,094	283,858
Amortization of intangible assets	[1]	1,448	1,571	4,453	5,043
Total operating expenses		228,541	210,456	671,478	615,813
Operating income		85,708	44,537	183,261	127,801
Interest expense, net		(10,111)	(8,223)	(29,795)	(21,799)
Other income, net		2,457	1,588	1,718	1,940
Income before income taxes		78,054	37,902	155,184	107,942
Provision for income taxes		13,902	8,181	17,644	14,173
Net income		64,152	29,721	137,540	93,769
Other comprehensive loss:
Foreign currency translation adjustments		(4,189)	(18,796)	(4,529)	(6,600)
Comprehensive income		$ 59,963	$ 10,925	$ 133,011	$ 87,169
Earnings per share:
Basic (in dollars per share)		$ 2.21	$ 1.00	$ 4.74	$ 3.13
Diluted (in dollars per share)		$ 2.12	$ 0.95	$ 4.54	$ 2.99
Shares used in computing earnings per share:
Basic (in shares)		28,967	29,708	29,000	29,924
Diluted (in shares)		30,292	31,161	30,295	31,341
Transactional and Maintenance
Revenues		$ 226,040	$ 192,143	$ 632,012	$ 555,337
Technology Service
Revenues		44,594	42,836	135,957	132,695
License
Revenues		$ 43,615	$ 20,014	$ 86,770	$ 55,582

[1] Cost of revenues and selling, general and administrative expenses exclude the amortization of intangible assets. See Note 4.