Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Healthcare	$ 202,897	$ 176,573	$ 155,989
Commuter	70,163	63,895	61,776
COBRA	75,246	51,299	31,996
Other	16,407	42,549	18,071
Total revenues	364,713	334,316	267,832
Operating expenses:
Cost of revenues (excluding amortization of internal use software)	130,224	117,170	100,226
Technology and development	45,271	43,041	27,741
Sales and marketing	57,496	50,540	44,940
General and administrative	63,732	54,093	42,884
Amortization and change in contingent consideration	34,097	27,618	20,992
Employee termination and other charges	1,147	1,913	0
Total operating expenses	331,967	294,375	236,783
Income from operations	32,746	39,941	31,049
Other income (expense):
Interest income	406	153	5
Interest expense	(2,192)	(1,925)	(1,612)
Other income (expense)	1,221	(182)	743
Income before income taxes	32,181	37,987	30,185
Income tax provision	(11,976)	(15,037)	(11,943)
Net income	$ 20,205	$ 22,950	$ 18,242
Net income per share:
Basic (in dollars per share)	$ 0.56	$ 0.64	$ 0.52
Diluted (in dollars per share)	$ 0.54	$ 0.63	$ 0.50
Shares used in computing net income per share:
Basic (in shares)	36,404	35,784	35,145
Diluted (in shares)	37,210	36,595	36,330