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Stockholders' Equity and Stock Incentive Plans (Classification of Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 3,441us-gaap_AllocatedShareBasedCompensationExpense	$ 6,481us-gaap_AllocatedShareBasedCompensationExpense
Gaming
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	68us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = byd_GamingExpenseMember	115us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = byd_GamingExpenseMember
Food and Beverage
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	13us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = byd_FoodAndBeverageExpenseMember	22us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = byd_FoodAndBeverageExpenseMember
Room
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	6us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = byd_RoomExpenseMember	10us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = byd_RoomExpenseMember
Selling, General and Administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	344us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember	584us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember
Corporate Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 3,010us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = byd_CorporateExpenseMember	$ 5,750us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = byd_CorporateExpenseMember

X

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

+ Details

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