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ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)
12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Summary of Changes in Accumulated Other Comprehensive Income (Loss) Included Within Shareholders' Equity
A summary of changes in accumulated other comprehensive loss included within shareholders’ equity is as follows (in thousands):
 
Twelve Months Ended
December 31, 2017
 
Twelve Months Ended
December 31, 2016
 
Foreign
Currency
Translation
Adjustments
 
Foreign
Currency
Hedge
 
Defined benefit pension plans
 
Tax
Provision
 
Total
 
Foreign
Currency
Translation
Adjustments
 
Foreign
Currency
Hedge
 
Defined benefit pension plans
 
Tax
Provision
 
Total
Balance at beginning of year
$
(31,973
)
 
$
5,048

 
$
(10,518
)
 
$
8,443

 
$
(29,000
)
 
$
(28,124
)
 
$
4,567

 
$

 
$
5,183

 
$
(18,374
)
Other comprehensive income (loss)
10,607

 
(1,802
)
 
3,297

 
(2,898
)
 
9,204

 
(3,849
)
 
481

 
(10,518
)
 
3,260

 
(10,626
)
Balance at end of year
$
(21,366
)
 
$
3,246

 
$
(7,221
)
 
$
5,545

 
$
(19,796
)
 
$
(31,973
)
 
$
5,048

 
$
(10,518
)
 
$
8,443

 
$
(29,000
)
Related Tax Effects Allocated to Each Component of Accumulated Other Comprehensive Income
The following table represents the related tax effects allocated to each component of other comprehensive income (loss) (in thousands):
 
Twelve Months Ended
December 31, 2017
 
Twelve Months Ended
December 31, 2016
 
Gross
Amount
 
Tax
Effect
 
Net
Amount
 
Gross
Amount
 
Tax
Effect
 
Net
Amount
Foreign currency translation adjustments
$
10,607

 
$
(2,919
)
 
$
7,688

 
$
(3,849
)
 
$
1,351

 
$
(2,498
)
Foreign currency hedge
(1,802
)
 
688

 
(1,114
)
 
481

 
(181
)
 
300

Defined benefit pension plans
3,297

 
(667
)
 
2,630

 
(10,518
)
 
2,090

 
(8,428
)
Total
$
12,102

 
$
(2,898
)
 
$
9,204

 
$
(13,886
)
 
$
3,260

 
$
(10,626
)
 
Seven Months Ended
December 31, 2015
 
Twelve Months Ended
May 31, 2015
 
Gross
Amount
 
Tax
Effect
 
Net
Amount
 
Gross
Amount
 
Tax
Effect
 
Net
Amount
Foreign currency translation adjustments
$
(7,228
)
 
$
2,330

 
$
(4,898
)
 
$
(15,822
)
 
$
2,559

 
$
(13,263
)
Foreign currency hedge
101

 
(39
)
 
62

 
3,237

 
(904
)
 
2,333

Total
$
(7,127
)
 
$
2,291

 
$
(4,836
)
 
$
(12,585
)
 
$
1,655

 
$
(10,930
)