Summary of Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Segment revenues:
Transactional and maintenance	$ 129,422		$ 113,708		$ 385,759		$ 342,734
Professional services	32,306		31,993		98,752		91,147
License	22,044		14,777		68,606		56,467
Total segment revenues	183,772		160,478		553,117		490,348
Segment operating expense	(138,238)		(115,763)		(408,873)		(342,561)
Segment operating income	45,534		44,715		144,244		147,787
Unallocated share-based compensation expense	(6,652)		(6,082)		(18,897)		(15,466)
Unallocated amortization expense	(3,477)	[1]	(1,465)	[1]	(10,453)	[1]	(4,885)	[1]
Unallocated restructuring and acquisition-related	(197)				(3,486)
Operating income	35,208		37,168		111,408		127,436
Unallocated interest income	15		82		45		276
Unallocated interest expense	(7,432)		(7,907)		(23,167)		(23,878)
Unallocated other expense, net	830		911		765		(271)
Income before income taxes	28,621		30,254		89,051		103,563
Depreciation expense	5,250		3,041		14,707		9,670
Applications
Segment revenues:
Transactional and maintenance	75,537		64,729		231,174		192,524
Professional services	26,230		27,109		79,704		77,192
License	13,216		6,484		46,027		34,956
Total segment revenues	114,983		98,322		356,905		304,672
Segment operating expense	(87,688)		(69,964)		(265,708)		(210,087)
Segment operating income	27,295		28,358		91,197		94,585
Depreciation expense	3,789		2,420		10,564		7,600
Scores
Segment revenues:
Transactional and maintenance	45,915		41,394		130,558		127,227
Professional services	806		500		3,333		1,309
License	431		26		770		351
Total segment revenues	47,152		41,920		134,661		128,887
Segment operating expense	(12,977)		(12,821)		(39,692)		(39,219)
Segment operating income	34,175		29,099		94,969		89,668
Depreciation expense	220		148		659		540
Tools
Segment revenues:
Transactional and maintenance	7,970		7,585		24,027		22,983
Professional services	5,270		4,384		15,715		12,646
License	8,397		8,267		21,809		21,160
Total segment revenues	21,637		20,236		61,551		56,789
Segment operating expense	(17,569)		(13,790)		(51,412)		(43,698)
Segment operating income	4,068		6,446		10,139		13,091
Depreciation expense	536		229		1,487		871
Unallocated Corporate Expenses
Segment revenues:
Segment operating expense	(20,004)		(19,188)		(52,061)		(49,557)
Segment operating income	(20,004)		(19,188)		(52,061)		(49,557)
Depreciation expense	$ 705		$ 244		$ 1,997		$ 659

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