RETIREMENT BENEFITS PLANS (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Gain included in accumulated other comprehensive income	$ (600,000)	$ (400,000)
Accumulated benefit obligation	49,600,000	42,900,000
Fair value of plan assets	31,103,000	26,943,000	$ 0
Plan assets expected to be returned next twelve months	0
Contributions expected to be paid to plan in 2018	1,900,000
Total contributions made	8,100,000	$ 7,200,000	$ 5,600,000
Austria, France and Germany
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0