v2.4.0.6

Asset Acquisitions Asset Acquisitions (Acquired Intangible Assets) (Details) (Peninsula Gaming, USD $) In Thousands, unless otherwise specified	0 Months Ended
	Nov. 20, 2012
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Total intangible assets acquired	$ 577,501
Customer Relationships
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Acquired finite-lived intangible assets	136,300
Acquired intangible assets, useful lives	4 years 10 months 24 days
Noncompete Agreements
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Acquired finite-lived intangible assets	3,200
Acquired intangible assets, useful lives	10 months 24 days
Trademarks
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Acquired indefinite-lived intangible assets	50,800
Gaming License Rights
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Acquired indefinite-lived intangible assets	$ 387,201

X

- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangible Assets

+ References

No definition available.

+ Details

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X

- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets

+ References

No definition available.

+ Details

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X

- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill

+ References

No definition available.

+ Details

Name:	byd_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Namespace Prefix:	byd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Details

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Namespace Prefix:	byd_
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X

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275

+ Details

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