CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Professional service revenues	$ 401,287	$ 342,074	$ 272,372
Insurance service revenues	2,258,001	1,851,457	1,371,903
Total revenues	2,659,288	2,193,531	1,644,275
Costs and operating expenses:
Insurance costs	2,112,376	1,686,315	1,226,585
Cost of providing services (exclusive of depreciation and amortization of intangible assets)	150,694	134,256	106,661
Sales and marketing	166,759	139,997	109,183
General and administrative	69,626	53,926	52,455
Systems development and programming costs	27,558	26,101	19,948
Amortization of intangible assets	39,346	52,302	51,369
Depreciation	14,612	13,843	11,737
Total costs and operating expenses	2,580,971	2,106,740	1,577,938
Operating income	78,317	86,791	66,337
Other income (expense):
Interest expense and bank fees	(19,449)	(54,193)	(45,724)
Other, net	1,142	478	471
Income before provision for income taxes	60,010	33,076	21,084
Provision for income taxes	28,315	17,579	7,937
Net income	$ 31,695	$ 15,497	$ 13,147
Net income per share:
Basic (in dollars per share)	$ 0.45	$ 0.24	$ 0.26
Diluted (in dollars per share)	$ 0.44	$ 0.22	$ 0.24
Weighted average shares:
Basic (in shares)	70,228,159	56,160,539	12,353,047
Diluted (in shares)	72,618,069	59,566,773	15,731,807