STOCK-BASED COMPENSATION - Reported Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock-based compensation expense
Total stock-based compensation, before taxes	$ 2,244	$ 1,681	$ 1,544
Tax benefit	(785)	(588)	(540)
Total stock-based compensation, net of tax	1,459	1,093	1,004
Casino
Stock-based compensation expense
Total stock-based compensation, before taxes	114	95	58
Food and beverage
Stock-based compensation expense
Total stock-based compensation, before taxes	92	101	85
Hotel
Stock-based compensation expense
Total stock-based compensation, before taxes	33	37	21
Selling, general and administrative
Stock-based compensation expense
Total stock-based compensation, before taxes	$ 2,005	$ 1,448	$ 1,380