RETIREMENT AND POSTRETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		$ 851	$ 584
Interest cost		970	662
Expected return on plan assets		(1,274)	(944)
Amortization of prior service cost		1	4
Amortization of net loss		575	453
Settlement charges (1)	[1]	0	0
Defined benefit plans		1,123	759
Multi-employer plans		227	193
Defined contribution plans		829	366
Total pension cost		2,179	1,318
Domestic Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		35	150
Interest cost		4,494	4,870
Expected return on plan assets		(6,916)	(7,671)
Amortization of prior service cost		0	0
Amortization of net loss		384	547
Settlement charges (1)	[1]	758	0
Defined benefit plans		(1,245)	(2,104)
Multi-employer plans		0	0
Defined contribution plans		5,894	6,398
Total pension cost		$ 4,649	$ 4,294

[1] Pension settlement charges resulting from a lump sum pension payment in the three months ended March 31, 2018.