Acquisitions, Purchase Price Accounting and Pro forma Information - Schedule of Purchase Consideration Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 01, 2018	Aug. 07, 2018	May 01, 2017	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Shares of ERI common stock issued for Isle common stock, shares				77,569,117	77,215,066
Tropicana Entertainment Inc
Business Acquisition [Line Items]
Cash consideration paid	$ 640,000
Lumière Loan	246,000
Cash paid to retire Tropicana's long-term debt	35,000
ERI portion of taxes due	6,333
Purchase consideration	$ 927,333
Elgin Acquisition
Business Acquisition [Line Items]
Cash consideration paid		$ 327,500
Working capital and other adjustments		1,304
Purchase consideration		$ 328,804
Isle of Capri
Business Acquisition [Line Items]
Cash consideration paid			$ 552,050
Shares of ERI common stock issued for Isle common stock, shares			28,468,182
Shares of ERI common stock issued for Isle common stock, per share			$ 19.12
Shares of ERI common stock issued for Isle common stock			$ 544,312
Cash paid to retire Tropicana's long-term debt			828,000
Shares of ERI common stock for Isle equity awards			10,383
Purchase consideration			$ 1,934,745