Summary of Segment Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment revenues:
Transactional and maintenance		$ 144,695	$ 132,254	$ 414,788	$ 394,278
Professional services		37,998	38,522	111,142	107,427
License		26,673	26,834	80,095	65,710
Total revenues		209,366	197,610	606,025	567,415
Segment operating expense		(172,312)	(161,189)	(509,692)	(456,987)
Unallocated share-based compensation expense		(12,166)	(9,345)	(32,762)	(25,631)
Unallocated amortization expense	[1]	(3,599)	(3,019)	(10,046)	(8,940)
Unallocated restructuring and acquisition-related		(2,256)	(621)	(2,256)	(4,281)
Operating income (loss)		37,054	36,421	96,333	110,428
Unallocated interest expense		(7,360)	(7,051)	(22,283)	(21,276)
Unallocated other income (expense), net		770	931	771	(381)
Income before income taxes		30,464	30,301	74,821	88,771
Depreciation expense		5,447	5,165	16,047	15,256
Operating Segments
Segment revenues:
Segment operating expense		(154,291)	(148,204)	(464,628)	(418,135)
Operating income (loss)		55,075	49,406	141,397	149,280
Applications
Segment revenues:
Transactional and maintenance		79,731	78,915	238,597	233,592
Professional services		31,009	31,898	90,500	87,058
License		16,394	19,043	47,923	36,732
Total revenues		127,134	129,856	377,020	357,382
Depreciation expense		3,734	3,616	10,948	10,714
Applications | Operating Segments
Segment revenues:
Segment operating expense		(90,228)	(86,413)	(274,157)	(247,326)
Operating income (loss)		36,906	43,443	102,863	110,056
Scores
Segment revenues:
Transactional and maintenance		54,255	44,077	145,006	133,955
Professional services		615	801	2,369	2,167
License		884	452	2,257	4,246
Total revenues		55,754	45,330	149,632	140,368
Depreciation expense		258	213	702	623
Scores | Operating Segments
Segment revenues:
Segment operating expense		(14,736)	(11,444)	(42,246)	(32,758)
Operating income (loss)		41,018	33,886	107,386	107,610
Tools
Segment revenues:
Transactional and maintenance		10,709	9,262	31,185	26,731
Professional services		6,374	5,823	18,273	18,202
License		9,395	7,339	29,915	24,732
Total revenues		26,478	22,424	79,373	69,665
Depreciation expense		834	706	2,424	1,942
Tools | Operating Segments
Segment revenues:
Segment operating expense		(28,554)	(24,923)	(86,080)	(66,798)
Operating income (loss)		(2,076)	(2,499)	(6,707)	2,867
Unallocated Corporate Expenses
Segment revenues:
Total revenues				0	0
Depreciation expense		621	630	1,973	1,977
Unallocated Corporate Expenses | Operating Segments
Segment revenues:
Segment operating expense		(20,773)	(25,424)	(62,145)	(71,253)
Operating income (loss)		$ (20,773)	$ (25,424)	$ (62,145)	$ (71,253)

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