Summary of Financial Information for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 61,224	$ 48,743
Revenues	58,042	45,712
Costs & expenses	43,473	37,643
Amortization of acquisition-related intangible assets		81
Depreciation & amortization	2,027	1,311
Operating income	15,724	9,708
Revenues	3,182	3,031
Outsourced Portals
Segment Reporting Information [Line Items]
Costs & expenses	34,875	30,415
Amortization of acquisition-related intangible assets		81
Depreciation & amortization	1,947	1,234
Operating income	21,220	13,982
Other Software & Services
Segment Reporting Information [Line Items]
Costs & expenses	1,205	999
Depreciation & amortization	15	14
Operating income	1,962	2,018
Other Reconciling Items
Segment Reporting Information [Line Items]
Costs & expenses	7,393	6,229
Depreciation & amortization	65	63
Operating income	$ (7,458)	$ (6,292)