The Company and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2014 Categories	Sep. 30, 2013	Dec. 31, 2013
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Number of business channels		2
Number of revenue and cost categories		2
Provision for losses on accounts receivable	$ 5,125,000	$ 266,000	$ 5,125,000
Non-cash charge per share after-tax	$ 0.05		$ 0.05
Allowance for doubtful accounts		500,000		600,000
Unvested service-based restricted stock awards included in the calculation of earnings per share		0.7	0.7
Selling, General and Administrative Expenses
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Legal fees and other third-party costs, net of directors' and officers' liability insurance received	700,000		1,500,000
Deposits Assets
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Cash subject to FDIC insurance		10,700,000
Cash not subject to FDIC insurance		95,300,000
Deposits Assets | Maximum
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Cash subject to FDIC insurance		$ 250,000