Total Taxes on Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of Taxes Other Than Income [Line Items]
(Taxes) benefit on unrealized gains (losses) on securities	$ (1,556)	$ 35	$ 35
(Tax) benefit on defined benefit pension plans	(121)	106	(159)
Total (taxes)benefit on other comprehensive income(loss)	$ (1,677)	$ 141	$ (124)