v2.4.0.6

Summary of Significant Accounting Policies (Preopening Expenses) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Component of Operating Other Cost and Expense [Line Items] |  |  |
Preopening expenses | $ 11,541 | $ 6,634 | $ 7,459
Boyd |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Preopening expenses | 22,437 | 17,492 | 8,405
LVE |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Preopening expenses | $ (10,896) | $ (10,858) | $ (946)

X
- Definition Preopening Expenses + References No definition available. + Details
Name: | byd_PreopeningExpenses
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ComponentOfOperatingOtherCostAndExpenseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration