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Accumulated Other Comprehensive Loss
 3 Months Ended
Mar. 31, 2018
Stockholders' Equity Note [Abstract]  
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss

The changes in the balances of accumulated other comprehensive loss by component are as follows:
(in thousands)
Foreign currency translation adjustment
 
Defined benefit pension plan
 
Liquidation of non-US entity and purchase of non-controlling interests
 
Total
Balance at December 31, 2017
$
(19,319
)
 
$
(2,555
)
 
$
338

 
$
(21,536
)
Other comprehensive income (loss)
7,416

 
(17
)
 
—

 
7,399

Balance at March 31, 2018
$
(11,903
)
 
$
(2,572
)
 
$
338

 
$
(14,137
)


The amounts presented above are in other comprehensive loss and are net of taxes. For additional information about foreign currency translation, see Note 6.