Stock Based Compensation Expenses (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
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	$ 1,190	$ 1,252	$ 3,267	$ 3,109
Income tax benefit	(444)	(534)	(1,235)	(1,321)
Net stock-based compensation expense	746	718	2,032	1,788
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	282	296	845	784
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	13	17	48	47
Selling & administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	$ 895	$ 939	$ 2,374	$ 2,278