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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Notes)
 3 Months Ended
Mar. 31, 2018
Stockholders' Equity Note [Abstract]  
Comprehensive Loss Note ACCUMULATED OTHER COMPREHENSIVE LOSS
 
Accumulated other comprehensive loss consisted of the following (amounts in thousands):
 
 
 
 
 
 
 
Currency
Translation
Adjustments
 
Unrecognized
Losses and
Prior Service
Cost
 
 
 
Total
Balance at January 1, 2018
$
(132,949
)
 
$
(24,127
)
 
$
(157,076
)
Currency translation adjustments
7,423

 
—

 
7,423

Defined benefit pension plan entries:
 

 
 

 
 

  Amortization of unrecognized losses and prior service cost,
  net of tax of $(54)
—

 
883

 
883

Balance at March 31, 2018
$
(125,526
)
 
$
(23,244
)
 
$
(148,770
)