Segment and Related Information - Schedule of Segment Revenues and Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Software licenses and royalties	$ 12,083	$ 10,090	$ 23,315	$ 18,920
Subscriptions	20,934	13,863	41,441	27,336
Software services	30,128	24,085	54,435	44,546
Maintenance	51,951	46,639	102,191	92,689
Appraisal services	5,444	5,056	10,295	10,647
Hardware and other	3,831	3,355	5,320	4,749
Total revenues	124,371	103,088	236,997	198,887
Segment operating income	25,194	17,000	46,666	33,150
Operating segments [Member] | Enterprise Software Solutions [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties	11,349	9,621	22,145	17,722
Subscriptions	20,124	13,089	39,846	25,990
Software services	27,420	21,952	49,607	40,693
Maintenance	47,765	42,566	93,858	84,448
Hardware and other	1,361	1,566	2,850	2,960
Intercompany	532	748	1,005	1,336
Total revenues	108,551	89,542	209,311	173,149
Segment operating income	27,747	20,327	53,175	38,155
Operating segments [Member] | Appraisal and Tax Software Solutions and Services [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties	734	469	1,170	1,198
Subscriptions	810	774	1,595	1,346
Software services	2,708	2,133	4,828	3,853
Maintenance	4,186	4,073	8,333	8,241
Appraisal services	5,444	5,056	10,295	10,647
Total revenues	13,882	12,505	26,221	25,285
Segment operating income	2,934	2,304	4,766	4,630
Corporate [Member]
Segment Reporting Information [Line Items]
Hardware and other	2,470	1,789	2,470	1,789
Intercompany	(532)	(748)	(1,005)	(1,336)
Total revenues	1,938	1,041	1,465	453
Segment operating income	$ (5,487)	$ (5,631)	$ (11,275)	$ (9,635)