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Employee Retirement and Benefit Plans - Schedule of Contributions to Each Multiemployer Pension Plans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Multiemployer pension plans [Member]
Multiemployer Plans [Line Items]
Total Contributions	$ 663
Multiemployer pension plans [Member] | Operating Engineers Local 501 Security Fund [Member]
Multiemployer Plans [Line Items]
Total Contributions	165
Multiemployer pension plans [Member] | Southern Nevada Culinary and Bartenders Pension Plan [Member]
Multiemployer Plans [Line Items]
Total Contributions	453
Multiemployer pension plans [Member] | Other Pension Plans [Member]
Multiemployer Plans [Line Items]
Total Contributions	45
Multiemployer benefit plans (excluding pension plans) [Member]
Multiemployer Plans [Line Items]
Total Contributions	1,693
Multiemployer benefit plans (excluding pension plans) [Member] | HEREIU Welfare Fund [Member]
Multiemployer Plans [Line Items]
Total Contributions	1,691
Multiemployer benefit plans (excluding pension plans) [Member] | All Other [Member]
Multiemployer Plans [Line Items]
Total Contributions	$ 2

X

- Definition

Amount of contributions made to multiemployer plan by employer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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