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EMPLOYEE BENEFITS (Tables)
 12 Months Ended
Dec. 31, 2017
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]  
Schedule Of Net Funded Status And Amounts Recognized In Balance Sheet And Accumulated Other Comprehensive Income Loss [Table Text Block]
A summary of the pension and postretirement benefits plans' funded status and amounts recognized in the Consolidated Balance Sheets is as follows (in thousands):
 
Pension Benefits
 
Postretirement
Benefits
 
December 31,
 
December 31,
 
2017
 
2016
 
2017
 
2016
Change in benefit obligation:
 

 
 

 
 

 
 

Benefit obligation at beginning of year
$
235,826

 
$
234,350

 
$
1,729

 
$
1,683

Service cost
1,949

 
2,178

 
12

 
11

Interest cost
6,019

 
6,624

 
73

 
76

Plan participants' contributions
1,581

 
1,516

 
283

 
292

Actuarial loss (gain)
5,769

 
7,117

 
(15
)
 
67

Foreign currency impact
6,437

 
(4,686
)
 
—

 
—

Benefits and administrative expenses paid
(9,514
)
 
(8,579
)
 
(381
)
 
(400
)
Settlements
(921
)
 
(2,694
)
 
—

 
—

Benefit obligation at end of year
247,146

 
235,826

 
1,701

 
1,729

 
 
 
 
 
 
 
 
Change in plan assets:
 

 
 

 
 

 
 

Fair value of plan assets at beginning of year
180,748

 
180,007

 
—

 
—

Actual return on plan assets
20,099

 
10,347

 
—

 
—

Employer contributions
4,618

 
4,214

 
98

 
108

Plan participants' contributions
1,581

 
1,516

 
283

 
292

Foreign currency impact
5,737

 
(4,063
)
 
—

 
—

Benefits and administrative expenses paid
(9,514
)
 
(8,579
)
 
(381
)
 
(400
)
Settlements
(921
)
 
(2,694
)
 
—

 
—

Fair value of plan assets at end of year
202,348

 
180,748

 
—

 
—

Funded status of plans
$
(44,798
)
 
$
(55,078
)
 
$
(1,701
)
 
$
(1,729
)
 
 
 
 
 
 
 
 
Amounts recognized in the Consolidated Balance Sheets consist of:
 

 
 

 
 

 
 

Non-current assets
$
2,956

 
$
2,387

 
$
—

 
$
—

Current liabilities
(264
)
 
(260
)
 
(105
)
 
(126
)
Non-current liabilities
(47,490
)
 
(57,205
)
 
(1,596
)
 
(1,603
)
Net amount recognized
$
(44,798
)
 
$
(55,078
)
 
$
(1,701
)
 
$
(1,729
)
 
 
 
 
 
 
 
 
Amounts recognized in Accumulated Other Comprehensive (Loss)
  consists of:
 

 
 

 
 

 
 

Net actuarial (loss) gain
$
(72,842
)
 
$
(80,837
)
 
$
552

 
$
581

Prior service credit
1,228

 
1,474

 
—

 
—

Accumulated other comprehensive (loss) income
(71,614
)
 
(79,363
)
 
552

 
581

Accumulated contributions in excess (deficit) of net periodic benefit cost
26,816

 
24,285

 
(2,253
)
 
(2,310
)
Net deficit recognized in Consolidated Balance Sheets
$
(44,798
)
 
$
(55,078
)
 
$
(1,701
)
 
$
(1,729
)
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]
The following information is presented for pension plans where the projected benefit obligations exceeded the fair value of plan assets (in thousands):
 
Pension Benefits
 
December 31,
 
2017
 
2016
Projected benefit obligations
$
242,309

 
$
230,724

Fair value of plan assets
194,554

 
173,259

Excess of projected benefit obligations over plan assets
$
47,755

 
$
57,465
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]
The following information is presented for pension plans where the accumulated benefit obligations exceeded the fair value of plan assets (in thousands):
 
Pension Benefits
 
December 31,
 
2017
 
2016
Accumulated benefit obligations
$
238,368

 
$
227,145

Fair value of plan assets
193,848

 
172,641

Excess of accumulated benefit obligations over plan assets
$
44,520

 
$
54,504
Summary of the components of net periodic pension benefit costs
A summary of the components of net periodic benefit cost for the Company, which includes an executive supplemental pension plan, is presented below (in thousands):
 
Pension Benefits
 
Postretirement Benefits
 
Year Ended December 31,
 
Year Ended December 31,
 
2017
 
2016
 
2015
 
2017
 
2016
 
2015
Service cost
$
1,949

 
$
2,178

 
$
1,953

 
$
12

 
$
11

 
$
12

Interest cost
6,019

 
6,624

 
6,676

 
73

 
76

 
74

Expected return on plan assets
(8,508
)
 
(9,025
)
 
(9,555
)
 
—

 
—

 
—

Amortization of prior service credit
(311
)
 
(311
)
 
(318
)
 
—

 
—

 
—

Amortization of transition asset
—

 
(214
)
 
(258
)
 
—

 
—

 
—

Settlement loss
118

 
633

 
16

 
—

 
—

 
—

Special termination benefits
—

 
—

 
235

 
—

 
—

 
—

Amortization of loss (gain)
3,740

 
3,645

 
3,273

 
(43
)
 
(58
)
 
(51
)
Net periodic benefit cost (income)
$
3,007

 
$
3,530

 
$
2,022

 
$
42

 
$
29

 
$
35
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
A summary of the changes in pension and postretirement benefits recognized in other comprehensive (income) loss is presented below (in thousands):
 
Pension Benefits
 
Postretirement Benefits
 
Year Ended December 31,
 
Year Ended December 31,
 
2017
 
2016
 
2015
 
2017
 
2016
 
2015
Net loss (gain) arising during year
$
(5,821
)
 
$
5,794

 
$
9,543

 
$
(15
)
 
$
67

 
$
(100
)
Amortization of transition asset
—

 
253

 
258

 
—

 
—

 
—

Amortization of prior service credit
311

 
311

 
318

 
—

 
—

 
—

Amortization of (gain) loss
(3,858
)
 
(4,317
)
 
(3,289
)
 
43

 
58

 
51

Foreign currency exchange impact
1,619

 
(1,267
)
 
(835
)
 
—

 
—

 
—

Total recognized in other comprehensive
   (income) loss
(7,749
)
 
774

 
5,995

 
28

 
125

 
(49
)
Net recognized in net periodic benefit cost and
   other comprehensive (income) loss
$
(4,742
)
 
$
4,304

 
$
8,017

 
$
70

 
$
154

 
$
(14
)
Schedule of Assumptions Used [Table Text Block]
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations include:
 
Pension Benefits
 
Postretirement
Benefits
 
2017
 
2016
 
2017
 
2016
Assumptions at December 31
 
 
 
 
 
 
 
For the domestic plans:
 
 
 
 
 
 
 
Discount rate
3.86
%
 
4.39
%
 
3.90
%
 
4.38
%
For the foreign pension plans:
 

 
 

 
 

 
 

Weighted average discount rate
0.87
%
 
0.89
%
 
 

 
 

Weighted average rate of compensation increase
1.52
%
 
1.51
%
 
 

 
 

Actuarial assumptions used to determine pension costs and other postretirement benefit costs include:
 
Pension Benefits
 
Postretirement Benefits
 
2017
 
2016
 
2015
 
2017
 
2016
 
2015
Assumptions at January 1
 
 
 
 
 
 
 
 
 

 
 

For the domestic plans:
 
 
 
 
 
 
 
 
 

 
 

Discount rate
4.39
%
 
4.75
%
 
4.28
%
 
4.38
%
 
4.69
%
 
4.23
%
Expected return on plan assets
7.50
%
 
7.50
%
 
7.50
%
 
N/A

 
N/A

 
N/A

For the foreign plans:
 

 
 

 
 

 
 

 
 

 
 

Weighted average discount rate
0.87
%
 
0.89
%
 
1.21
%
 
 

 
 

 
 

Weighted average expected return on plan assets
3.14
%
 
3.91
%
 
3.95
%
 
 

 
 

 
 

Weighted average rate of compensation increase
1.52
%
 
1.51
%
 
1.52
%
 
 

 
 

 
 
Schedule of Expected Benefit Payments [Table Text Block]
The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid (in thousands):
Year
 
Pension Benefits
 
Postretirement Benefits
2018
 
$
10,589

 
$
106

2019
 
11,510

 
114

2020
 
10,978

 
120

2021
 
11,617

 
121

2022
 
12,071

 
115

Thereafter
 
60,140

 
496