The Amounts in AOCI That are Expected to be Amortized as Net Expense (Income) During Next Fiscal Year (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Pension Plans, Defined Benefit
Schedule of Pension and Other Postretirment Benefits Expected Benefit Payments [Line Items]
Amount of net prior service cost	$ (138)
Amount of net loss	2,838
Other Postretirement Benefit Plans, Defined Benefit
Schedule of Pension and Other Postretirment Benefits Expected Benefit Payments [Line Items]
Amount of net prior service cost	2
Amount of net loss	$ 43