Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Operating revenue	$ 66,813	$ 50,808	$ 195,278	$ 153,688
Operating expenses:
Cost of services provided	17,809	10,275	55,993	29,851
Product development	8,338	6,779	22,673	20,230
Sales and marketing	3,805	3,559	10,795	10,644
General and administrative	12,128	6,008	34,995	26,917
Amortization and depreciation	2,765	2,449	7,932	7,442
Total operating expenses	44,845	29,070	132,388	95,084
Operating income	21,968	21,738	62,890	58,604
Interest income	62	61	167	326
Interest expense	(1,058)	(392)	(2,402)	(850)
Non-operating (loss)/income - put options	0	(19)	0	296
Nonoperating Income (Expense)	0	(350)	0	(350)
Foreign currency exchange gain	1,137	987	2,359	532
Income before income taxes	22,109	22,025	63,014	58,558
Income tax expense	(1,877)	(4,010)	(5,410)	(11,547)
Net income	$ 20,232	$ 18,015	$ 57,604	$ 47,011
Basic earnings per common share	$ 0.59	$ 0.47	$ 1.65	$ 1.23
Diluted earnings per common share	$ 0.59	$ 0.47	$ 1.63	$ 1.22
Basic weighted average shares outstanding	34,304	38,050	35,014	38,264
Diluted weighted average shares outstanding	34,515	38,253	35,241	38,499