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Detail of Certain Balance Sheet Accounts (Property and Equipment) (Details) (USD $)	6 Months Ended		6 Months Ended				3 Months Ended				3 Months Ended			3 Months Ended				3 Months Ended				3 Months Ended				6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Land [Member]	Dec. 31, 2013 Land [Member]	Jun. 30, 2014 Buildings [Member]	Dec. 31, 2013 Buildings [Member]	Jun. 30, 2014 Buildings [Member] Minimum [Member]	Jun. 30, 2014 Buildings [Member] Maximum [Member]	Jun. 30, 2014 Leasehold improvements [Member]	Dec. 31, 2013 Leasehold improvements [Member]	Jun. 30, 2014 Leasehold improvements [Member] Minimum [Member]	Jun. 30, 2014 Machinery and equipment [Member]	Dec. 31, 2013 Machinery and equipment [Member]	Jun. 30, 2014 Machinery and equipment [Member] Minimum [Member]	Jun. 30, 2014 Machinery and equipment [Member] Maximum [Member]	Jun. 30, 2014 Furniture and fixtures [Member]	Dec. 31, 2013 Furniture and fixtures [Member]	Jun. 30, 2014 Furniture and fixtures [Member] Minimum [Member]	Jun. 30, 2014 Furniture and fixtures [Member] Maximum [Member]	Jun. 30, 2014 Company vehicles [Member]	Dec. 31, 2013 Company vehicles [Member]	Jun. 30, 2014 Company vehicles [Member] Minimum [Member]	Jun. 30, 2014 Company vehicles [Member] Maximum [Member]	Jun. 30, 2014 Construction in progress [Member]	Dec. 31, 2013 Construction in progress [Member]	Jun. 30, 2014 Land and Building [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives							P30Y	P40Y			varies			P7Y	P20Y			P3Y	P10Y			P3Y	P5Y
Total	$ 1,028,150,000	$ 974,086,000	$ 290,303,000	$ 269,778,000	$ 416,185,000	$ 405,918,000			$ 131,199,000	$ 120,531,000		$ 83,288,000	$ 79,209,000			$ 75,601,000	$ 70,918,000			$ 8,701,000	$ 8,508,000			$ 22,873,000	$ 19,224,000
Less accumulated depreciation and amortization	190,329,000	177,730,000
Property and equipment, net	837,821,000	796,356,000
Capital expenditures incurred for purchase and construction of assets	38,900,000
Acquisition of fixed assets			21,700,000																							29,800,000
Assets Held-for-sale, Long Lived	$ 32,700,000

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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Amount of acquisition 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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Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

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Amount before accumulated depreciation, depletion and amortization of 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, and furniture and fixtures.

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