Segment and Related Information - Schedule of Segment Revenues and Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Software licenses and royalties	$ 14,586	$ 12,083	$ 28,886	$ 23,315
Subscriptions	26,949	20,934	52,237	41,441
Software services	34,563	30,128	65,367	54,435
Maintenance	59,463	51,951	116,811	102,191
Appraisal services	6,691	5,444	12,780	10,295
Hardware and other	4,043	3,831	5,180	5,320
Total revenues	146,295	124,371	281,261	236,997
Segment operating income	31,203	25,194	59,989	46,666
Operating segments [Member] | Enterprise Software Solutions [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties	13,556	11,349	25,883	22,145
Subscriptions	25,733	20,124	50,042	39,846
Software services	31,826	27,420	60,994	49,607
Maintenance	54,992	47,765	108,007	93,858
Hardware and other	1,330	1,361	2,468	2,850
Intercompany	979	532	1,905	1,005
Total revenues	128,416	108,551	249,299	209,311
Segment operating income	34,408	27,747	66,660	53,175
Operating segments [Member] | Appraisal and Tax Software Solutions and Services [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties	1,030	734	3,003	1,170
Subscriptions	1,216	810	2,195	1,595
Software services	2,737	2,708	4,373	4,828
Maintenance	4,471	4,186	8,804	8,333
Appraisal services	6,691	5,444	12,780	10,295
Hardware and other	11		11
Total revenues	16,156	13,882	31,166	26,221
Segment operating income	3,903	2,934	6,971	4,766
Corporate [Member]
Segment Reporting Information [Line Items]
Hardware and other	2,702	2,470	2,701	2,470
Intercompany	(979)	(532)	(1,905)	(1,005)
Total revenues	1,723	1,938	796	1,465
Segment operating income	$ (7,108)	$ (5,487)	$ (13,642)	$ (11,275)