OTHER OPERATIONAL EXPENSES (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Oil and gas, subsidy charges	$ 17,741
ENSCO Deep Water Drilling Rig
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Loss on contract termination	20,000
Saxon Appalachian Rig
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Loss on contract termination	9,889
Foreign Currency Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other operational loss	$ 6,081