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ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
 12 Months Ended
Dec. 31, 2014
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 on investments
 
Total
 
(in thousands)
Balance as of December 31, 2012
$
11,627

 
$
(5,066
)
 
$
(149
)
 
$
6,412

     Other comprehensive income before reclassifications
3,325

 
2,913

 
147

 
6,385

     Amounts reclassified from accumulated other comprehensive income
—

 
—

 
—

 
—

            Net increase in other comprehensive income
3,325

 
2,913

 
147

 
6,385

Balance as of December 31, 2013
$
14,952

 
$
(2,153
)
 
$
(2
)
 
$
12,797

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

 
—

 
—

 
—

            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
)