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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)
 12 Months Ended
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of accumulated other comprehensive loss
Amounts related to the changes in accumulated other comprehensive loss were as follows (in thousands):
 
 
Unrealized gain (loss) on marketable securities
 
Net unrealized loss on retirement plan(2)
 
Total
 
Affected line items in the consolidated statement of income
Balance January 1, 2012, net of tax
 
$
13

 
$
(5,870
)
 
$
(5,857
)
 
 
Other comprehensive loss before reclassification
 
(31
)
 
(442
)
 
(473
)
 
 
Reclassification to net income (1)
 
—

 
628

 
628

 
Selling, general and administrative and research and development
Change during period
 
(31
)
 
186

 
155

 
 
Balance December 31, 2012, net of tax
 
$
(18
)
 
$
(5,684
)
 
$
(5,702
)
 
 
Other comprehensive loss before reclassification
 
(6
)
 
901

 
895

 
 
Reclassification to net income (1)
 
—

 
439

 
439

 
Selling, general and administrative and research and development
Change during period
 
(6
)
 
1,340

 
1,334

 
 
Balance December 31, 2013, net of tax
 
$
(24
)
 
$
(4,344
)
 
$
(4,368
)
 
 
Other comprehensive (loss) income before reclassification
 
(4
)
 
(385
)
 
(389
)
 
 
Reclassification to net income (1)
 
—

 
375

 
375

 
Selling, general and administrative and research and development
Change during period
 
(4
)
 
(10
)
 
(14
)
 
 
Balance December 31, 2014, net of tax
 
$
(28
)
 
$
(4,354
)
 
$
(4,382
)
 
 

_______________________________________________
(1) The Company reclassified amortization of prior service cost and actuarial loss for its retirement plan from accumulated other comprehensive loss to net income in the amounts of $375,000, $439,000 and $628,000 for the years ended December 31, 2014, 2013 and 2012, respectively.
(2) Refer to Note 13: Supplemental Executive Retirement Plan.