Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Software licenses	$ 33,172	$ 32,594	$ 34,913
Subscriptions	44,618	31,160	23,298
Software services	83,408	69,617	68,340
Maintenance	171,851	146,498	135,655
Appraisal services	22,543	23,228	20,554
Hardware and other	7,712	6,294	5,868
Total revenues	363,304	309,391	288,628
Cost of revenues:
Software licenses	1,983	3,034	3,456
Acquired software	1,888	1,125	1,592
Software services, maintenance and subscriptions	171,584	143,776	138,085
Appraisal services	14,889	14,550	12,910
Hardware and other	5,258	4,994	4,268
Total cost of revenues	195,602	167,479	160,311
Gross profit	167,702	141,912	128,317
Selling, general and administrative expenses	86,706	75,650	69,480
Research and development expense	20,140	16,414	13,971
Amortization of customer and trade name intangibles	4,279	3,331	3,225
Operating income	56,577	46,517	41,641
Other expense, net	2,709	2,404	1,742
Income before income taxes	53,868	44,113	39,899
Income tax provision	20,874	16,556	14,845
Net income	32,994	27,557	25,054
Earnings per common share:
Basic	$ 1.09	$ 0.88	$ 0.74
Diluted	$ 1.00	$ 0.83	$ 0.71
Unrealized gains (losses) on investment securities available-for-sale	134	(123)	200
Income tax expense (benefit) related to components of other comprehensive income (loss)	47	(43)	70
Other comprehensive income (loss), net of tax	87	(80)	130
Comprehensive Income	$ 33,081	$ 27,477	$ 25,184