INCOME TAXES (Details)	3 Months Ended				9 Months Ended		12 Months Ended
	Dec. 31, 2017 USD ($) item	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Operating Loss Carryforwards [Line Items]
Income tax expense		$ 39,080,000		$ 49,803,000	$ 81,557,000	$ 91,575,000
Decrease in valuation allowance			$ (4,791,000)				$ (4,655,000)
Forecast [Member]
Operating Loss Carryforwards [Line Items]
State net operating loss carryforwards	$ 53,751,000
Number of additional partial release of valuation allowance | item	1
Alabama [Member] | State [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards expiration date					Dec. 31, 2023
Alabama [Member] | State [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards expiration date					Dec. 31, 2029
Alabama [Member] | Forecast [Member]
Operating Loss Carryforwards [Line Items]
State net operating loss carryforwards	$ 52,552,000