Summary of Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Segment revenues:
Transactional and maintenance	$ 131,410		$ 129,655
Professional services	35,198		34,286
License	22,942		20,402
Total revenues	189,550		184,343
Segment operating expense	(164,670)		(149,073)
Unallocated share-based compensation expense	(8,794)		(7,235)
Unallocated amortization expense	(2,932)	[1]	(3,013)	[1]
Unallocated restructuring and acquisition-related	0		(3,660)
Operating income	24,880		35,270
Unallocated interest expense	(7,205)		(7,126)
Unallocated other income (expense), net	649		(961)
Income before income taxes	18,324		27,183
Depreciation expense	5,175		5,154
Operating Segments
Segment revenues:
Segment operating expense	(152,944)		(135,165)
Operating income	36,606		49,178
Applications
Segment revenues:
Transactional and maintenance	78,551		77,779
Professional services	28,499		26,787
License	8,448		7,350
Total revenues	115,498		111,916
Depreciation expense	3,508		3,637
Applications | Operating Segments
Segment revenues:
Segment operating expense	(88,894)		(81,962)
Operating income	26,604		29,954
Scores
Segment revenues:
Transactional and maintenance	42,937		43,318
Professional services	788		589
License	216		3,273
Total revenues	43,941		47,180
Depreciation expense	217		212
Scores | Operating Segments
Segment revenues:
Segment operating expense	(12,892)		(10,375)
Operating income	31,049		36,805
Tools
Segment revenues:
Transactional and maintenance	9,922		8,558
Professional services	5,911		6,910
License	14,278		9,779
Total revenues	30,111		25,247
Depreciation expense	783		614
Tools | Operating Segments
Segment revenues:
Segment operating expense	(29,539)		(21,071)
Operating income	572		4,176
Unallocated Corporate Expenses
Segment revenues:
Depreciation expense	667		691
Unallocated Corporate Expenses | Operating Segments
Segment revenues:
Segment operating expense	(21,619)		(21,757)
Operating income	$ (21,619)		$ (21,757)

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