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Condensed Consolidating Financial Information (Narrative) (Details)	Dec. 31, 2018	Jun. 25, 2018	Dec. 31, 2017	Mar. 28, 2016	May 21, 2015	Nov. 10, 2010
For the year ending December 31,
Subsidiaries, Ownership Percentage	80.00%
Boyd
For the year ending December 31,
Subsidiaries, Ownership Percentage						100.00%
Boyd | Senior Notes | 6.000% Senior Notes Due 2026 [Member]
For the year ending December 31,
Debt instrument, stated interest rate	6.00%	6.00%
Subsidiaries, Ownership Percentage		100.00%
Boyd | Senior Notes | Senior Notes Due 2023 [Member]
For the year ending December 31,
Debt instrument, stated interest rate	6.875%		6.875%		6.875%	6.875%
Subsidiaries, Ownership Percentage					100.00%
Boyd | Senior Notes | Senior Notes Due 2026 [Member]
For the year ending December 31,
Debt instrument, stated interest rate	6.375%		6.375%	6.375%	6.375%
Subsidiaries, Ownership Percentage					100.00%

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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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