Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating revenue:	$ 168,969	$ 132,188	$ 97,685
Operating expenses:
Cost of services provided	33,589	29,599	21,274
Product development	19,208	13,607	11,362
Sales and marketing	13,642	6,372	5,040
General and administrative	26,268	24,065	16,798
Amortization and depreciation	7,514	6,038	3,955
Total operating expenses	100,221	79,681	58,429
Operating income	68,748	52,507	39,256
Interest income	557	519	199
Interest expense	(759)	(902)	(1,070)
Other non-operating income	647	6,319	89
Foreign exchange gain	4,302	1,211	1,358
Income before income taxes	73,495	59,654	39,832
Income tax provision	(2,117)	(635)	(1,010)
Net income	$ 71,378	$ 59,019	$ 38,822
Basic earnings per common share	$ 1.89	$ 1.69	$ 1.24
Diluted earnings per common share	$ 1.75	$ 1.51	$ 1.03
Basic weighted average shares outstanding	37,742	34,845	31,398
Diluted weighted average shares outstanding	40,889	39,018	38,014