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Weighted Average Shares Outstanding - Schedule of Basic and Diluted Common Shares Outstanding, Calculated on Weighted Average Basis (Parenthetical) (Detail)	Dec. 31, 2018	Dec. 31, 2017
Earnings per share [abstract]
Share options	507,066	4,426,237

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- References

No definition available.

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- Definition

Dilutive share options.

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No definition available.

+ Details

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Namespace Prefix:	stn_
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Balance Type:	na
Period Type:	instant