Detail of Certain Balance Sheet Accounts (Property and Equipment) (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Property and Equipment
Total	$ 1,157,344,000us-gaap_PropertyPlantAndEquipmentGross	$ 1,153,758,000us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation and amortization	212,859,000	203,370,000
Property and equipment, net	944,485,000us-gaap_PropertyPlantAndEquipmentNet	950,388,000us-gaap_PropertyPlantAndEquipmentNet
Capital expenditures incurred for purchase and construction of assets	8,400,000
Assets Held-for-sale, Long Lived	4,000,000us-gaap_AssetsHeldForSaleLongLived
Land [Member]
Property and Equipment
Total	330,494,000	328,474,000
Acquisition of fixed assets	3,600,000
Buildings [Member]
Property and Equipment
Total	481,340,000	482,496,000
Buildings [Member] \| Minimum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	P30Y
Buildings [Member] \| Maximum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	P40Y
Leasehold improvements [Member]
Property and Equipment
Total	133,968,000	134,658,000
Leasehold improvements [Member] \| Minimum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	varies
Machinery and equipment [Member]
Property and Equipment
Total	89,672,000	87,728,000
Machinery and equipment [Member] \| Minimum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	P7Y
Machinery and equipment [Member] \| Maximum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	P20Y
Furniture and fixtures [Member]
Property and Equipment
Total	78,525,000	77,581,000
Furniture and fixtures [Member] \| Minimum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	P3Y
Furniture and fixtures [Member] \| Maximum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	P10Y
Company vehicles [Member]
Property and Equipment
Total	10,961,000	10,706,000
Company vehicles [Member] \| Minimum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	P3Y
Company vehicles [Member] \| Maximum [Member]
Property and Equipment
Property, Plant and Equipment, Estimated Useful Lives	P5Y
Construction in progress [Member]
Property and Equipment
Total	$ 32,384,000	$ 32,115,000

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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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.

+ References

No definition available.

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- Definition

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).

+ References

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-Publisher FASB

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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