Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Operating revenue	$ 50,808	$ 50,293	$ 153,688	$ 153,863
Operating expenses:
Cost of services provided	10,275	10,136	29,851	30,385
Product development	6,779	6,625	20,230	20,384
Sales and marketing	3,559	4,024	10,644	11,763
General and administrative	6,008	8,448	26,917	26,672
Amortization and depreciation	2,449	2,459	7,442	7,459
Total operating expenses	29,070	31,692	95,084	96,663
Operating income	21,738	18,601	58,604	57,200
Interest income	61	159	326	343
Interest expense	(392)	(318)	(850)	(961)
Non-operating income - put options	(19)	93	296	(1,250)
Non-operating expense - securities litigation	(350)	(4,226)	(350)	(4,226)
Foreign currency exchange loss	987	(33)	532	(326)
Income before income taxes	22,025	14,276	58,558	50,780
Income tax expense	(4,010)	(1,133)	(11,547)	(6,751)
Net income	$ 18,015	$ 13,143	$ 47,011	$ 44,029
Basic earnings per common share	$ 0.47	$ 0.35	$ 1.23	$ 1.18
Diluted earnings per common share	$ 0.47	$ 0.34	$ 1.22	$ 1.14
Basic weighted average shares outstanding	38,050	37,919	38,264	37,435
Diluted weighted average shares outstanding	38,253	38,451	38,499	38,676