Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Software licenses and royalties	$ 10,090	$ 8,422	$ 18,920	$ 15,985
Subscriptions	13,863	10,553	27,336	20,521
Software services	24,085	21,737	44,546	40,267
Maintenance	46,639	42,060	92,689	81,910
Appraisal services	5,056	5,771	10,647	11,453
Hardware and other	3,355	2,825	4,749	3,955
Total revenues	103,088	91,368	198,887	174,091
Cost of revenues:
Software licenses and royalties	692	484	1,118	1,050
Acquired software	523	482	1,072	892
Software services, maintenance and subscriptions	48,833	43,118	95,215	82,931
Appraisal services	3,418	3,876	7,217	7,672
Hardware and other	2,580	2,709	3,378	3,428
Total cost of revenues	56,046	50,669	108,000	95,973
Gross profit	47,042	40,699	90,887	78,118
Selling, general and administrative expenses	24,971	21,699	47,617	43,034
Research and development expense	5,594	5,408	11,192	10,502
Amortization of customer and trade name intangibles	1,128	1,137	2,259	2,083
Operating income	15,349	12,455	29,819	22,499
Other expense, net	296	773	634	1,476
Income before income taxes	15,053	11,682	29,185	21,023
Income tax provision	6,006	4,577	11,645	8,237
Net income	9,047	7,105	17,540	12,786
Earnings per common share:
Basic	$ 0.29	$ 0.24	$ 0.55	$ 0.42
Diluted	$ 0.26	$ 0.22	$ 0.51	$ 0.39
Comprehensive income:
Comprehensive income	$ 9,106	$ 7,105	$ 17,599	$ 12,786