Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified										12 Months Ended						12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Land Owned [Member]	Dec. 31, 2012 Land Owned [Member]	Dec. 31, 2013 Land Under Capital Lease [Member]	Dec. 31, 2012 Land Under Capital Lease [Member]	Dec. 31, 2013 Buildings and Improvements Owned [Member]	Dec. 31, 2012 Buildings and Improvements Owned [Member]	Dec. 31, 2013 Buildings and Improvements Owned [Member] Minimum [Member]	Dec. 31, 2013 Buildings and Improvements Owned [Member] Maximum [Member]	Dec. 31, 2013 Buildings Under Capital Lease [Member]	Dec. 31, 2012 Buildings Under Capital Lease [Member]	Dec. 31, 2013 Machinery and Equipment [Member]	Dec. 31, 2012 Machinery and Equipment [Member]	Dec. 31, 2013 Machinery and Equipment [Member] Minimum [Member]	Dec. 31, 2013 Machinery and Equipment [Member] Maximum [Member]	Dec. 31, 2013 Construction in Progress [Member]	Dec. 31, 2012 Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life										15 years	40 years	20 years				3 years	12 years
Property, plant and equipment, Gross	$ 339,299	$ 318,587		$ 6,139	$ 5,937	$ 1,437	$ 1,396	$ 45,964	$ 43,751			$ 3,172	$ 3,082	$ 261,842	$ 244,138			$ 20,745	$ 20,283
Less - accumulated depreciation	218,210	198,900
Property, plant and equipment, net	$ 121,089	$ 119,687	$ 120,528