RELATED PARTY TRANSACTIONS (Details) $ in Thousands			3 Months Ended		9 Months Ended
	Aug. 28, 2015 USD ($) ft² a item	Sep. 30, 2004 USD ($)	Sep. 30, 2019 USD ($) ft²	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) ft²	Sep. 30, 2018 USD ($)	Nov. 17, 2015 USD ($)
RELATED PARTY TRANSACTIONS
Right of use asset			$ 15,776		$ 15,776
Operating lease liability			15,786		15,786
Driveway Lease
RELATED PARTY TRANSACTIONS
Operating expenses related to lease		$ 1,350
Biggest Little Investments, L.P. (BLI) | Parking Lot Lease
RELATED PARTY TRANSACTIONS
Number of parking spaces | item	300
Minimum annual rent							$ 695
Anniversary years subject to cost of living adjustment rent increases	5 years
Lease renewal option additional term	10 years
Amount due to related party if lease is not renewed	$ 1,600
Rent paid			174	$ 174	522	$ 522
Operating expenses related to lease			6	6	19	15
Right of use asset			10,900		10,900
Operating lease liability			$ 10,900		$ 10,900
Biggest Little Investments, L.P. (BLI) | Driveway Lease
RELATED PARTY TRANSACTIONS
Lease term		15 years
Area of property | ft²			37,400		37,400
Minimum annual rent		$ 300
Anniversary years subject to cost of living adjustment rent increases		5 years
Number of terms for which the lease can be renewed | item	3
Lease renewal option additional term	5 years
Cost of improvements, useful life		15 years
Rent paid			$ 94	94	$ 282	282
Operating expenses related to lease			7	6	20	15
Operating expenses related to lease		$ 2,000
Right of use asset			4,200		4,200
Operating lease liability			4,200		4,200
Affiliates | Billboard advertising, storage space and parking lot space
RELATED PARTY TRANSACTIONS
Rent paid			$ 48	$ 42	$ 117	$ 109
Golden Road | Biggest Little Investments, L.P. (BLI) | Parking Lot Lease
RELATED PARTY TRANSACTIONS
Lease term	20 years
Golden Road | Biggest Little Investments, L.P. (BLI) | Parking Lot Lease | Buildings
RELATED PARTY TRANSACTIONS
Area of property | ft²	46,000
Area of land | a	4.2