Summary of Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Segment revenues:
Transactional and maintenance	$ 129,655		$ 129,898
Professional services	34,286		32,337
License	20,402		27,785
Total segment revenues	184,343		190,020
Segment operating expense	(149,073)		(147,026)
Unallocated share-based compensation expense	(7,235)		(5,832)
Unallocated amortization expense	(3,013)	[1]	(3,372)	[1]
Unallocated restructuring and acquisition-related	(3,660)		(3,289)
Operating income	35,270		42,994
Unallocated interest income	6		21
Unallocated interest expense	(7,132)		(7,880)
Unallocated other expense, net	(961)		(92)
Income before income taxes	27,183		35,043
Depreciation expense	5,154		4,601
Operating Segments
Segment revenues:
Segment operating expense	(135,165)		(134,533)
Operating income	49,178		55,487
Applications
Segment revenues:
Transactional and maintenance	77,779		79,625
Professional services	26,787		26,159
License	7,350		18,923
Total segment revenues	111,916		124,707
Depreciation expense	3,637		3,285
Applications | Operating Segments
Segment revenues:
Segment operating expense	(81,962)		(83,762)
Operating income	29,954		40,945
Scores
Segment revenues:
Transactional and maintenance	43,318		42,437
Professional services	589		903
License	3,273		107
Total segment revenues	47,180		43,447
Depreciation expense	212		216
Scores | Operating Segments
Segment revenues:
Segment operating expense	(10,375)		(12,907)
Operating income	36,805		30,540
Tools
Segment revenues:
Transactional and maintenance	8,558		7,836
Professional services	6,910		5,275
License	9,779		8,755
Total segment revenues	25,247		21,866
Depreciation expense	614		471
Tools | Operating Segments
Segment revenues:
Segment operating expense	(21,071)		(16,330)
Operating income	4,176		5,536
Unallocated Corporate Expenses
Segment revenues:
Depreciation expense	691		629
Unallocated Corporate Expenses | Operating Segments
Segment revenues:
Segment operating expense	(21,757)		(21,534)
Operating income	$ (21,757)		$ (21,534)

[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.