Summary of Financial Information for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Revenues	$ 61,330	$ 53,206	$ 188,492	$ 153,931
Costs & expenses	51,070	41,091	140,690	118,676
Amortization of acquisition-related intangible assets		53		214
Depreciation & amortization	2,145	1,606	6,221	4,236
Operating income	8,115	10,456	41,581	30,805
Outsourced Portals
Segment Reporting Information [Line Items]
Revenues	57,721	50,198	177,857	144,952
Costs & expenses	42,577	34,030	114,915	97,052
Amortization of acquisition-related intangible assets		53		214
Depreciation & amortization	2,052	1,532	5,969	4,013
Operating income	13,092	14,583	56,973	43,673
Other Software & Services
Segment Reporting Information [Line Items]
Revenues	3,609	3,008	10,635	8,979
Costs & expenses	1,057	1,219	3,583	3,293
Depreciation & amortization	13	16	41	44
Operating income	2,539	1,773	7,011	5,642
Other Reconciling Items
Segment Reporting Information [Line Items]
Costs & expenses	7,436	5,842	22,192	18,331
Depreciation & amortization	80	58	211	179
Operating income	$ (7,516)	$ (5,900)	$ (22,403)	$ (18,510)