CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Transactional and maintenance		$ 150,743	$ 138,683	$ 297,815	$ 270,093
Professional services		39,342	37,946	73,494	73,144
License		16,593	30,480	35,445	53,422
Total revenues		206,678	207,109	406,754	396,659
Operating expenses:
Cost of revenues	[1]	62,298	70,991	124,491	137,291
Research and development		24,848	24,341	49,479	46,978
Selling, general and administrative	[1]	77,501	73,863	156,339	146,664
Amortization of intangible assets	[1]	3,507	3,515	7,087	6,447
Total operating expenses		168,154	172,710	337,396	337,380
Operating income		38,524	34,399	69,358	59,279
Interest expense, net		(6,815)	(7,718)	(13,539)	(14,923)
Other income (expense), net		435	(648)	101	1
Income before income taxes		32,144	26,033	55,920	44,357
Provision for income taxes		9,028	7,163	13,563	11,080
Net income		23,116	18,870	42,357	33,277
Other comprehensive loss:
Foreign currency translation adjustments		(905)	(19,068)	(7,024)	(30,519)
Comprehensive income (loss)		$ 22,211	$ (198)	$ 35,333	$ 2,758
Earnings per share:
Basic (in dollars per share)		$ 0.74	$ 0.60	$ 1.36	$ 1.05
Diluted (in dollars per share)		$ 0.72	$ 0.58	$ 1.31	$ 1.01
Shares used in computing earnings per share:
Basic (in shares)		31,268	31,335	31,226	31,639
Diluted (in shares)		32,262	32,448	32,349	32,791

[1] Cost of revenues and selling, general and administrative expenses exclude the amortization of intangible assets. See Note 5.