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ACCUMULATED OTHER COMPREHENSIVE LOSS
 9 Months Ended
Sep. 30, 2015
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
ACCUMULATED OTHER COMPREHENSIVE LOSS
ACCUMULATED OTHER COMPREHENSIVE LOSS
 
Comprehensive income is defined as a change in equity of a company during a period, from transactions and other events and circumstances excluding transactions resulting from investments by owners and distributions to owners. The primary difference between net income and comprehensive income for the Company arises from foreign currency translation adjustments, actuarial loss related to defined benefit pension plans and net unrealized loss on investments. The following table summarizes the changes in accumulated balances of other comprehensive loss, net of tax:
 
Foreign currency translation adjustments
 
Defined benefit pension plans
 
Change in unrealized loss on investments
 
Total
 
(in thousands)
Balance as of December 31, 2014
$
1,053

 
$
(8,462
)
 
$
(773
)
 
$
(8,182
)
     Other comprehensive (loss) gain
(7,535
)
 
(803
)
 
1,376

 
(6,962
)
Balance as of September 30, 2015
$
(6,482
)
 
$
(9,265
)
 
$
603

 
$
(15,144
)