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Long-Term Debt (Other Boyd Notes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
For the year ending December 31,
Unamortized discount	$ (1,556)	$ (1,888)
Interest	19,858	33,407
Gain Loss on Early Retirements of Debt	(1,582)	(42,364)	$ (40,733)
Boyd
For the year ending December 31,
Outstanding principal	3,121,558	3,283,129
Gain Loss on Early Retirements of Debt	(1,582)	(28,356)	$ (30,829)
Boyd | Other
For the year ending December 31,
Unamortized discount	0	0
Fair Value, Inputs, Level 3 [Member] | Boyd | Other
For the year ending December 31,
Outstanding principal	$ 504	$ 591

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount, after accumulated amortization, of debt discount.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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