Segment and Related Information - Schedule of Segment Revenues and Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Software licenses and royalties									$ 40,841	$ 33,928	$ 32,594
Subscriptions									61,864	44,618	31,160
Software services									93,267	83,408	69,617
Maintenance									191,720	171,851	146,498
Appraisal services									20,825	22,543	23,228
Hardware and other									8,126	6,956	6,294
Total revenues	110,735	107,021	103,088	95,799	95,368	93,845	91,368	82,723	416,643	363,304	309,391
Depreciation and amortization expense									13,786	12,711	10,676
Segment operating income									73,723	62,744	50,973
Capital expenditures									26,145	10,716	12,278
Segment assets	444,488				338,666				444,488	338,666	295,391
Operating segments [Member]
Segment Reporting Information [Line Items]
Segment operating income									73,723	62,744	50,973
Operating segments [Member] | Enterprise Software Solutions [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties									38,774	32,060	30,194
Subscriptions									59,070	43,319	30,400
Software services									85,459	76,103	60,840
Maintenance									175,180	155,290	130,999
Hardware and other									6,342	5,297	5,199
Intercompany									2,899	2,249	2,103
Total revenues									367,724	314,318	259,735
Depreciation and amortization expense									10,569	9,929	8,516
Segment operating income									85,045	71,135	56,856
Capital expenditures									22,457	5,469	11,143
Segment assets	161,923				134,160				161,923	134,160	119,595
Operating segments [Member] | Appraisal And Tax Software Solutions And Services [Member]
Segment Reporting Information [Line Items]
Software licenses and royalties									2,067	1,868	2,400
Subscriptions									2,794	1,299	760
Software services									7,808	7,305	8,777
Maintenance									16,540	16,561	15,499
Appraisal services									20,825	22,543	23,228
Total revenues									50,034	49,576	50,664
Depreciation and amortization expense									1,028	958	650
Segment operating income									9,428	8,498	9,786
Capital expenditures									250	3,382	137
Segment assets	16,244				18,464				16,244	18,464	20,535
Corporate [Member]
Segment Reporting Information [Line Items]
Hardware and other									1,784	1,659	1,095
Intercompany									(2,899)	(2,249)	(2,103)
Total revenues									(1,115)	(590)	(1,008)
Depreciation and amortization expense									2,189	1,824	1,510
Segment operating income									(20,750)	(16,889)	(15,669)
Capital expenditures									3,438	1,865	998
Segment assets	$ 266,321				$ 186,042				$ 266,321	$ 186,042	$ 155,261