Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Operating revenue	$ 51,476	$ 51,004	$ 102,880	$ 103,570
Operating expenses:
Cost of services provided	9,964	10,358	19,576	20,249
Product development	6,758	6,724	13,451	13,759
Sales and marketing	3,784	3,827	7,085	7,739
General and administrative	11,068	8,253	20,909	18,224
Amortization and depreciation	2,441	2,548	4,993	5,000
Total operating expenses	34,015	31,710	66,014	64,971
Operating income	17,461	19,294	36,866	38,599
Interest income	130	91	265	184
Interest expense	(211)	(281)	(458)	(643)
Non-operating income - put options	(139)	(1,425)	315	(1,343)
Foreign currency exchange loss	(336)	(123)	(455)	(293)
Income before income taxes	16,905	17,556	36,533	36,504
Income tax expense	(3,326)	(4,014)	(7,537)	(5,618)
Net income	$ 13,579	$ 13,542	$ 28,996	$ 30,886
Basic earnings per common share	$ 0.35	$ 0.36	$ 0.76	$ 0.83
Diluted earnings per common share	$ 0.35	$ 0.35	$ 0.75	$ 0.80
Basic weighted average shares outstanding	38,427	37,210	38,373	37,189
Diluted weighted average shares outstanding	38,647	38,789	38,624	38,784