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Long-Term Debt (Other Boyd Notes) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
For the year ending December 31, |  |  |
Unamortized discount | $ (1,286) | $ (1,556) |
Interest | 35,734 | 19,858 |
Gain Loss on Early Retirements of Debt | (61) | (1,582) | $ (42,364)
Boyd |  |  |
For the year ending December 31, |  |  |
Outstanding principal | 4,030,035 | 3,121,558 |
Gain Loss on Early Retirements of Debt | (61) | (1,582) | $ (28,356)
Boyd | Other |  |  |
For the year ending December 31, |  |  |
Unamortized discount | $ 0 | $ 0 |
Line of Credit Facility, Interest Rate at Period End | 11.01% | 5.80% |
Notes Payable, Other Payables [Member] | Boyd | Other |  |  |
For the year ending December 31, |  |  |
Outstanding principal | $ 57,700 |  |
Belterra Park [Member] | Boyd | Other |  |  |
For the year ending December 31, |  |  |
Line of Credit Facility, Interest Rate at Period End | 11.11% |  |

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- Definition 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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