Accumulated Other Comprehensive Loss - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity [Abstract]
Other comprehensive (income) loss, before reclassifications	$ 600,000	$ 0	$ 600,000	$ 0
Amounts reclassified from AOCI, before tax	$ 0	$ 0	$ 200,000	$ (200,000)