Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Operating revenue	$ 71,066,000	$ 63,753,000
Operating expenses:
Cost of services provided	19,602,000	19,485,000
Product development	8,065,000	7,047,000
Sales and marketing	4,333,000	3,379,000
General and administrative	11,583,000	10,746,000
Amortization and depreciation	2,720,000	2,597,000
Total operating expenses	46,303,000	43,254,000
Operating income	24,763,000	20,499,000
Interest income	143,000	61,000
Interest expense	(1,274,000)	(719,000)
Foreign currency exchange gain	469,000	892,000
Income before income taxes	24,101,000	20,733,000
Income tax expense	(1,750,000)	(2,397,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	22,351,000	18,336,000
Net Income (Loss) Attributable to Noncontrolling Interest	192,000	0
Net Income (Loss) Attributable to Parent	$ 22,159,000	$ 18,336,000
Basic earnings per common share	$ 0.67	$ 0.51
Diluted earnings per common share	$ 0.67	$ 0.51
Basic weighted average shares outstanding	33,043	35,708
Diluted weighted average shares outstanding	33,310	35,954