SUBSEQUENT EVENTS SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands			12 Months Ended
	Feb. 20, 2018	Feb. 13, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross			$ 232,630	$ 295	$ 13,228
Pension Plan [Member]
Subsequent Event [Line Items]
Contributions made by employer					$ 145,000
Pension Plan [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Contributions made by employer		$ 50,000
Power | Dresser-Rand Government Business (Dresser-Rand) [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross	$ 213,000