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Long-Term Debt (Interest and Fees - Narrative) (Details)	12 Months Ended
	Dec. 31, 2016
Line of Credit Facility [Line Items]
Prepayment fee, percentage	1.00%
Boyd | Bank Credit Facility | Federal Funds Rate | Minimum
Line of Credit Facility [Line Items]
Debt instrument, stated interest rate	0.50%
Boyd | Bank Credit Facility | Eurodollar | Minimum
Line of Credit Facility [Line Items]
Debt instrument, stated interest rate	1.00%
Boyd | Revolving Credit Facility, Swing Loan and Term Loan A | LIBOR | Minimum
Line of Credit Facility [Line Items]
Applicable margin	1.75%
Boyd | Revolving Credit Facility, Swing Loan and Term Loan A | LIBOR | Maximum
Line of Credit Facility [Line Items]
Applicable margin	2.75%
Boyd | Revolving Credit Facility, Swing Loan and Term Loan A | Base Rate | Minimum
Line of Credit Facility [Line Items]
Applicable margin	0.75%
Boyd | Revolving Credit Facility, Swing Loan and Term Loan A | Base Rate | Maximum
Line of Credit Facility [Line Items]
Applicable margin	1.75%
Boyd | Revolving Credit Facility [Member] | Bank Credit Facility | Minimum
Line of Credit Facility [Line Items]
Commitment fee percentage on unused portion of credit facility	0.25%
Boyd | Revolving Credit Facility [Member] | Bank Credit Facility | Maximum
Line of Credit Facility [Line Items]
Commitment fee percentage on unused portion of credit facility	0.50%
Boyd | Term Loan B | Base Rate
Line of Credit Facility [Line Items]
Applicable margin	2.00%
Boyd | Term Loan B | Eurodollar | Minimum
Line of Credit Facility [Line Items]
Applicable margin	1.00%
Boyd | Term Loan B | Eurodollar | Maximum
Line of Credit Facility [Line Items]
Applicable margin	3.00%

X

- Definition

Debt Instrument, Prepayment Fee, Percentage

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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