Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss)		$ 234,000
Other comprehensive income (loss)		(2,100,000)
Income tax benefit (expense)		800,000
Total other comprehensive income (loss)	474,000	(1,296,000)
Accumulated other comprehensive income (loss)	$ (1,062,000)	$ (1,062,000)