Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues:
Software licenses	$ 32,594	$ 34,913	$ 42,131
Subscriptions	31,160	23,298	17,181
Software services	69,617	68,340	80,405
Maintenance	146,498	135,655	124,512
Appraisal services	23,228	20,554	18,740
Hardware and other	6,294	5,868	7,317
Total revenues	309,391	288,628	290,286
Cost of revenues:
Software licenses	3,034	3,456	5,440
Acquired software	1,125	1,592	1,411
Software services, maintenance and subscriptions	143,776	138,085	137,199
Appraisal services	14,550	12,910	11,518
Hardware and other	4,994	4,268	5,955
Total cost of revenues	167,479	160,311	161,523
Gross profit	141,912	128,317	128,763
Selling, general and administrative expenses	75,650	69,480	70,115
Research and development expense	16,414	13,971	11,159
Amortization of customer and trade name intangibles	3,331	3,225	2,705
Operating income	46,517	41,641	44,784
Other expense, net	2,404	1,742	146
Income before income taxes	44,113	39,899	44,638
Income tax provision	16,556	14,845	17,628
Net income	$ 27,557	$ 25,054	$ 27,010
Earnings per common share:
Basic	$ 0.88	$ 0.74	$ 0.77
Diluted	$ 0.83	$ 0.71	$ 0.74
Basic weighted average common shares outstanding	31,267	34,075	35,240
Diluted weighted average common shares outstanding	33,154	35,528	36,624