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Employee Retirement and Benefit Plans - Schedule of Multiemployer Pension Plans (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Central Pension Fund of the IUOE and Participating Employers [Member]      
Multiemployer Plans [Line Items]      
EIN 366052390    
Plan Number 001    
Pension Protection Zone Status [1]   Green Green
FIR/RP Status Pending /Implemented No    
Surcharge Imposed No    
Expiration Dates of Collective Bargaining Agreements, First Date Mar. 31, 2018    
Expiration Dates of Collective-Bargaining Agreements, Last Date Mar. 31, 2020    
Southern Nevada Culinary and Bartenders Pension Plan [Member]      
Multiemployer Plans [Line Items]      
EIN 886016617    
Plan Number 001    
Pension Protection Zone Status [1]   Green Green
FIR/RP Status Pending /Implemented No    
Surcharge Imposed No    
Expiration Dates of Collective Bargaining Agreement May 31, 2023    
[1] The Pension Protection Act of 2006 requires plans that are certified as endangered (yellow) or critical (red) to develop and implement a funding improvement plan.