Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating revenue	$ 47,716	$ 42,267	$ 91,543	$ 82,317
Operating expenses:
Cost of services provided	9,157	8,914	18,186	16,221
Product development	5,814	4,802	10,086	9,421
Sales and marketing	4,296	3,261	8,108	6,113
General and administrative	8,577	4,694	15,021	12,455
Amortization and depreciation	2,161	1,991	4,102	3,868
Total operating expenses	30,005	23,662	55,503	48,078
Operating income	17,711	18,605	36,040	34,239
Interest income	110	129	277	329
Interest expense	(312)	(159)	(565)	(374)
Other non-operating income (loss)	262	(464)	262	(818)
Foreign currency exchange gain	2,591	1,397	2,295	2,865
Income before income taxes	20,362	19,508	38,309	36,241
Income tax benefit (expense)	(2,295)	2,840	(4,557)	1,271
Net income	$ 18,067	$ 22,348	$ 33,752	$ 37,512
Basic earnings per common share	$ 0.49	$ 0.57	$ 0.92	$ 0.97
Diluted earnings per common share	$ 0.47	$ 0.53	$ 0.86	$ 0.90
Basic weighted average shares outstanding	36,908	39,159	36,679	38,658
Diluted weighted average shares outstanding	38,827	42,344	39,175	41,882