Income Taxes - Deferred Income Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets:
Employment - related liabilities	$ 11,946	$ 12,814
Liabilities related to discontinued operations	959	1,155
Capital loss carryforwards	273	391
Asbestos-related liability	18,172	23,702
Net operating loss - state	1,654	1,795
Inventory related	2,644	2,017
Impairment charge associated with investment in UES-MG	2,316	0
Other	3,939	3,803
Gross deferred income tax assets	49,474	69,235
Valuation allowance	(2,639)	(2,887)
Deferred tax assets, net, Total	46,835	66,348
Liabilities:
Depreciation	(31,918)	(31,931)
Mark-to-market adjustment - derivatives	(73)	(153)
Other	(2,495)	(2,353)
Gross deferred income tax liabilities	(34,486)	(34,437)
Net deferred income tax assets	12,349	31,911
Foreign Tax Authority [Member]
Assets:
Pension liability	2,434	3,984
Domestic Tax Authority [Member]
Assets:
Pension liability	$ 5,137	$ 19,574