Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)		$ 234,000
Other comprehensive income (loss)		(2,900,000)
Income tax benefit (expense)		1,100,000
Other comprehensive income (loss), net of tax	(1,139,000)	(1,770,000)
Accumulated other comprehensive income (loss)	$ (1,536,000)	$ (1,536,000)