Fair Value of Pension Plan Assets Measured Using Significant Unobservable Inputs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Ending balance	$ 69,032	$ 61,334
Level 3
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Beginning balance	8,343	6,210
Relating to assets held at reporting date	980	683
Relating to assets sold during the period	17	0
Purchases, sales and settlements, net	217	1,350
Foreign currency translation adjustment	53	100
Ending balance	$ 9,610	$ 8,343