Tax Effects allocated to Accumulated Other Comprehensive Income (Loss) Components (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Other Comprehensive Income (Loss) [Line Items]
Before-tax amount	$ (262)	$ 14	$ (3)
Tax expense (benefit)	(86)	4	(1)
Net-of-tax amount	$ (176)	$ 10	$ (2)