The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified							3 Months Ended				3 Months Ended				3 Months Ended				3 Months Ended				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Land	Dec. 31, 2012 Land	Mar. 31, 2013 Buildings	Dec. 31, 2012 Buildings	Mar. 31, 2013 Buildings Minimum	Mar. 31, 2013 Buildings Maximum	Mar. 31, 2013 Building Improvements	Dec. 31, 2012 Building Improvements	Mar. 31, 2013 Building Improvements Minimum	Mar. 31, 2013 Building Improvements Maximum	Mar. 31, 2013 Machinery and Equipment	Dec. 31, 2012 Machinery and Equipment	Mar. 31, 2013 Machinery and Equipment Minimum	Mar. 31, 2013 Machinery and Equipment Maximum	Mar. 31, 2013 Furniture, fixtures and office equipment	Dec. 31, 2012 Furniture, fixtures and office equipment	Mar. 31, 2013 Furniture, fixtures and office equipment Minimum	Mar. 31, 2013 Furniture, fixtures and office equipment Maximum	Mar. 31, 2013 Computer Equipment and Software	Dec. 31, 2012 Computer Equipment and Software	Mar. 31, 2013 Computer Equipment and Software Maximum	Mar. 31, 2013 Leasehold Improvements	Dec. 31, 2012 Leasehold Improvements	Mar. 31, 2013 Construction in Progress	Dec. 31, 2012 Construction in Progress
Property, Plant and Equipment [Line Items]
Estimated Useful Life (Years)							39 years	40 years			5 years	40 years			3 years	15 years			5 years	10 years			3 years
Property and equipment - gross	$ 286,529	$ 285,210	$ 5,273	$ 5,273	$ 54,948	$ 54,948			$ 114,245	$ 114,245			$ 81,396	$ 81,382			$ 5,239	$ 5,239			$ 11,876	$ 11,840		$ 17	$ 17	$ 13,535	$ 12,266
Less accumulated depreciation and amortization	(104,239)	(101,249)
Property and equipment - net	$ 182,290	$ 183,961