Income Taxes (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 693,000	$ 384,000	$ 2,596,000	$ 2,017,000
Reversal of valuation allowance	$ 1,100,000	$ 300,000	$ 3,200,000	$ 2,100,000