Property and Equipment (Property and Equipment, Including Original Useful Lives) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Property and Equipment
Property and equipment	3,993,509us-gaap_PropertyPlantAndEquipmentGross	$ 3,606,837us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation and amortization	1,334,949	1,181,734
Net property and equipment	2,658,560us-gaap_PropertyPlantAndEquipmentNet	2,425,103us-gaap_PropertyPlantAndEquipmentNet
Land [Member]
Property and Equipment
Property and equipment	527,471	457,858
Buildings and building improvements [Member]
Property and Equipment
Property and equipment	1,418,479	1,197,369
Buildings and building improvements [Member] \| Minimum [Member]
Property and Equipment
Property, plant and equipment, useful lives, in years	15 years
Buildings and building improvements [Member] \| Maximum [Member]
Property and Equipment
Property, plant and equipment, useful lives, in years	39 years
Leasehold improvements [Member]
Property and Equipment
Property and equipment	523,550	483,578
Leasehold improvements [Member] \| Minimum [Member]
Property and Equipment
Property, plant and equipment, useful lives, in years	3 years
Leasehold improvements [Member] \| Maximum [Member]
Property and Equipment
Property, plant and equipment, useful lives, in years	25 years
Furniture, fixtures and equipment [Member]
Property and Equipment
Property and equipment	1,052,846	960,928
Furniture, fixtures and equipment [Member] \| Minimum [Member]
Property and Equipment
Property, plant and equipment, useful lives, in years	3 years
Furniture, fixtures and equipment [Member] \| Maximum [Member]
Property and Equipment
Property, plant and equipment, useful lives, in years	20 years
Vehicles [Member]
Property and Equipment
Property and equipment	279,874	251,505
Vehicles [Member] \| Minimum [Member]
Property and Equipment
Property, plant and equipment, useful lives, in years	5 years
Vehicles [Member] \| Maximum [Member]
Property and Equipment
Property, plant and equipment, useful lives, in years	10 years
Construction in progress [Member]
Property and Equipment
Property and equipment	191,289	$ 255,599

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

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)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.14)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 14

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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- Definition

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

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 7

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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Data Type:	na
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- Details

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Data Type:	na
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- Details

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- Details

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Data Type:	na
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- Details

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