FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Assets
Marketable securities (Other assets)	$ 5,081,000
Derivative contracts	879,000
Assets, fair value, total	5,960,000
Liabilities
Derivative contracts	12,054,000
Liabilities, fair value, total	12,054,000
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Marketable securities (Other assets)	5,081,000
Derivative contracts	0
Assets, fair value, total	5,081,000
Liabilities
Derivative contracts	0
Liabilities, fair value, total	0
Significant Other Observable Inputs (Level 2)
Assets
Marketable securities (Other assets)	0
Derivative contracts	0
Assets, fair value, total	0
Liabilities
Derivative contracts	10,110,000
Liabilities, fair value, total	10,110,000
Significant Unobservable Inputs (Level 3)
Assets
Marketable securities (Other assets)	0
Derivative contracts	879,000
Assets, fair value, total	879,000
Liabilities
Derivative contracts	1,944,000
Liabilities, fair value, total	$ 1,944,000
Predecessor
Assets
Marketable securities (Other assets)		$ 8,746,000
Assets, fair value, total		8,746,000
Liabilities
Liabilities, fair value, total		0
Predecessor | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Marketable securities (Other assets)		8,746,000
Assets, fair value, total		8,746,000
Predecessor | Significant Other Observable Inputs (Level 2)
Assets
Marketable securities (Other assets)		0
Assets, fair value, total		0
Predecessor | Significant Unobservable Inputs (Level 3)
Assets
Marketable securities (Other assets)		0
Assets, fair value, total		$ 0