Income Taxes - Summary of Unrecognized Tax Benefits and the Associated Interest and Penalties (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Beginning balance, Unrecognized tax benefits	$ 437,000	$ 407,000
Prior year tax position, Unrecognized tax benefits
Current year tax position, Unrecognized tax benefits
Deferred tax position, Unrecognized tax benefits	8,000	30,000
Settlements with tax authorities, Unrecognized tax benefits
Expiration of the statute of limitations, Unrecognized tax benefits
Ending balance, Unrecognized tax benefits	445,000	437,000
Beginning balance, Interest and penalties
Prior year tax position, Interest and penalties
Current year tax position, Interest and penalties
Deferred tax position, Interest and penalties
Settlements with tax authorities, Interest and penalties
Expiration of the statute of limitations, Interest and penalties
Ending balance at December, Interest and penalties