SUBSEQUENT EVENTS (Details) - USD ($) $ in Millions	Dec. 05, 2018	Dec. 05, 2017	Dec. 07, 2016	Nov. 30, 2018
Subsequent Event [Line Items]
Repurchase period			1 year
Share Repurchase Program [Member]
Subsequent Event [Line Items]
Repurchase period		1 year
Share Repurchase Program [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Repurchase period	1 year
Disposed of by Sale [Member] | Commercial Property [Member] | Property in Minot, ND [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Sale price				$ 6.6