Segment and Related Information - Schedule of Segment Revenues and Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Software licenses and royalties	$ 11,232	$ 8,830
Subscriptions	20,507	13,473
Software services	24,307	20,461
Maintenance	50,240	46,050
Appraisal services	4,851	5,591
Hardware and other	1,489	1,394
Intercompany
Total revenues	112,626	95,799
Segment operating income	21,472	16,150
Operating segments [Member] | Enterprise Software Solutions [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties	10,795	8,100
Subscriptions	19,722	12,901
Software services	22,188	18,741
Maintenance	46,093	41,882
Appraisal services
Hardware and other	1,489	1,394
Intercompany	473	589
Total revenues	100,760	83,607
Segment operating income	25,428	17,828
Operating segments [Member] | Appraisal And Tax Software Solutions And Services [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties	437	730
Subscriptions	785	572
Software services	2,119	1,720
Maintenance	4,147	4,168
Appraisal services	4,851	5,591
Hardware and other
Intercompany
Total revenues	12,339	12,781
Segment operating income	1,831	2,326
Corporate [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties
Subscriptions
Software services
Maintenance
Appraisal services
Hardware and other
Intercompany	(473)	(589)
Total revenues	(473)	(589)
Segment operating income	$ (5,787)	$ (4,004)