Stock Based Compensation Expenses (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	$ 1,199	$ 1,134	$ 2,077	$ 1,857
Income tax benefit	(469)	(485)	(788)	(787)
Net stock-based compensation expense	730	649	1,289	1,070
Cost of portal revenues, exclusive of depreciation & amortization
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	306	275	563	488
Cost of software & services revenues, exclusive of depreciation & amortization
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	19	21	36	30
Selling & administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	$ 874	$ 838	$ 1,478	$ 1,339