COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($)	3 Months Ended
	Nov. 30, 2014	May 31, 2020	May 31, 2019	May 31, 2018	May 31, 2017	Aug. 31, 2016
Commitments And Contingencies [Line Items]
Accrual for taxes other than income taxes, Current					$ 3,500,000	$ 4,000,000
Contractual obligation					5,600,000	1,500,000
Land purchase option agreement					1,100,000
Deposit that could be forfeited					50,000
Land under purchase options, Not recorded					30,500,000
Purchase commitment, Remaining minimum amount committed					41,000
Provisional assessments, includes taxes, penalties and interest related to withholding taxes	$ 2,600,000
Additional provisional assessment	$ 5,200,000
Income taxes receivable					15,984,000	$ 16,778,000
Unknown Country [Member]
Commitments And Contingencies [Line Items]
Deferred tax assets, net					2,000,000
Income taxes receivable					$ 3,900,000
Scenario, Forecast [Member]
Commitments And Contingencies [Line Items]
Purchase commitment, Remaining minimum amount committed		$ 186,000	$ 372,000	$ 372,000