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ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
 12 Months Ended
Dec. 31, 2015
Equity [Abstract]  
ACCUMULATED OTHER COMPREHENSIVE INCOME
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
 
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) income, net of tax:
 
Foreign currency translation adjustments
 
Defined benefit pension plans
 
Change in unrealized (loss) gain on investments
 
Total
 
(in thousands)
Balance as of December 31, 2013
$
14,952

 
$
(2,153
)
 
$
(2
)
 
$
12,797

     Other comprehensive loss
(13,899
)
 
(6,309
)
 
(771
)
 
(20,979
)
     Amounts reclassified from accumulated other comprehensive income
—

 
—

 
—

 
—

            Net decrease in other comprehensive loss
(13,899
)
 
(6,309
)
 
(771
)
 
(20,979
)
Balance as of December 31, 2014
$
1,053

 
$
(8,462
)
 
$
(773
)
 
$
(8,182
)
     Other comprehensive (loss) gain
(11,342
)
 
7,096

 
(1,364
)
 
(5,610
)
     Amounts reclassified from accumulated other comprehensive loss
—

 
—

 
2,137

 
2,137

            Net (decrease) increase in other comprehensive loss
(11,342
)
 
7,096

 
773

 
(3,473
)
Balance as of December 31, 2015
$
(10,289
)
 
$
(1,366
)
 
$
—

 
$
(11,655
)