CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Transactional and maintenance		$ 652,660	$ 605,919	$ 564,232
Professional services		179,569	169,738	151,773
License		99,940	105,699	122,776
Total revenues		932,169	881,356	838,781
Operating expenses:
Cost of revenues	[1]	287,123	265,173	270,535
Research and development		110,870	103,669	98,824
Selling, general and administrative	[1]	339,796	328,940	300,002
Amortization of intangible assets	[1]	12,709	13,982	13,673
Restructuring and acquisition-related		4,471	0	18,242
Total operating expenses		754,969	711,764	701,276
Operating income		177,200	169,592	137,505
Interest expense, net		(25,790)	(26,633)	(29,150)
Other income (expense), net		(86)	1,610	883
Income before income taxes		151,324	144,569	109,238
Provision for income taxes		23,068	35,121	22,736
Net income		128,256	109,448	86,502
Other comprehensive income (loss):
Foreign currency translation adjustments		10,517	(26,296)	(27,526)
Comprehensive income		$ 138,773	$ 83,152	$ 58,976
Basic earnings per share (in dollars per share)		$ 4.16	$ 3.52	$ 2.75
Shares used in computing basic earnings per share (in shares)		30,862	31,129	31,402
Diluted earnings per share (in dollars per share)		$ 3.98	$ 3.39	$ 2.65
Shares used in computing diluted earnings per share (in shares)		32,245	32,308	32,609

[1] Cost of revenues and selling, general and administrative expenses exclude the amortization of intangible assets. See Note 7.