The Company and Summary of Significant Accounting Policies - Additional Information (Detail) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) Categories	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Categories shares	Sep. 30, 2014 USD ($) shares	Dec. 31, 2014 USD ($)
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Number of business channels | Categories	2		2
Number of revenue and cost categories | Categories	2		2
Selling & administrative	$ 10,577,000	$ 10,397,000	$ 31,933,000	$ 29,446,000
Cost of portal revenues, exclusive of depreciation & amortization	41,058,000	39,091,000	125,367,000	116,201,000
Cost of software & services revenues, exclusive of depreciation & amortization	1,365,000	1,287,000	3,976,000	$ 3,525,000
Allowance for doubtful accounts	500,000		$ 500,000		$ 500,000
Unvested service-based restricted stock awards included in the calculation of earnings per share | shares			0.7	0.7
Reclassification Adjustment
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Selling & administrative		(1,000,000)		$ (3,200,000)
Cost of portal revenues, exclusive of depreciation & amortization		$ 1,000,000		3,100,000
Cost of software & services revenues, exclusive of depreciation & amortization				$ 100,000
Deposits Assets
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Cash subject to FDIC insurance	10,500,000		$ 10,500,000
Cash not subject to FDIC insurance	111,900,000		111,900,000
Deposits Assets | Maximum
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
FDIC deposit insurance coverage per depositor	$ 250,000		$ 250,000