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ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)
 12 Months Ended
Dec. 31, 2013
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Components of accumulated other comprehensive income, net of tax
The following table summarizes the changes in accumulated balances of other comprehensive income (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, 2011
$
7,725

 
$
1,712

 
$
11

 
$
9,448

     Other comprehensive income (loss) before reclassifications
3,902

 
(6,778
)
 
(946
)
 
(3,822
)
     Amounts reclassified from accumulated other comprehensive income
—

 
—

 
786

 
786

            Net increase (decrease) in other comprehensive income
3,902

 
(6,778
)
 
(160
)
 
(3,036
)
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

 

All amounts reclassified from accumulated other comprehensive income were related to losses on available-for-sale securities. These reclassifications impacted "interest and other income (expense), net" on the consolidated statements of operations.