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 Categories	Sep. 30, 2013 Categories	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Deposits Assets	Sep. 30, 2013 Deposits Assets Maximum	Sep. 09, 2013 Commonwealth Of Pennsylvania
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]
Number of business channels	2	2
Number of revenue and cost categories	2	2
Provision for losses on accounts receivable	$ 5,125,000	$ 5,125,000	$ 157,000
Non-cash charge per share after-tax	$ 0.05	$ 0.05
Accounts receivable							5,100,000
Allowance for doubtful accounts	600,000	600,000		600,000
Unvested service-based restricted stock awards included in the calculation of earnings per share		0.7	0.7
Cash subject to FDIC insurance					9,800,000	250,000
Cash not subject to FDIC insurance					$ 81,100,000