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Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2016	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,905,150		$ 4,905,150		$ 4,840,240
Less accumulated depreciation	2,397,767		2,397,767		2,300,454
Property and equipment, net	2,507,383		2,507,383		2,539,786
Depreciation expense	51,357	$ 47,771	101,503	$ 97,165
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	293,540		293,540		294,533
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,948,779		2,948,779		2,935,539
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,379,460		1,379,460		1,311,704
Riverboats and barges
Property, Plant and Equipment [Line Items]
Property and equipment, gross	239,713		239,713		238,926
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 43,658		$ 43,658		$ 59,538

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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