SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2014

Accounting Policies [Abstract]

Available-for-sale Securities [Table Text Block]

Amortized cost and estimated fair market value of investments classified as available-for-sale at March 31, 2014, are as follows(in thousands):

	Amortized		Gross Unrealized					Estimated Fair
	Cost		Gains		Losses			Market Value
Investments due in less than 3 months:
Commercial paper	$	3,722	$	1	$	—		$	3,723
Total	$	3,722	$	1	$	—		$	3,723
Investments due in 4-12 months:
Corporate securities	$	16,502	$	63	$	—		$	16,565
Total	$	16,502	$	63	$	—		$	16,565
Investments due between 12 months and 5-years:
Corporate securities	$	116,826	$	300	$	(7	)	$	117,119
Total	$	116,826	$	300	$	(7	)	$	117,119
Total investment securities	$	137,050	$	364	$	(7	)	$	137,407

Amortized cost and estimated fair market value of investments classified as available-for-sale at December 31, 2013, are as follows(in thousands):    

	Amortized		Gross Unrealized					Estimated Fair
	Cost		Gains		Losses			Market Value
Investments due in less than 3 months:
Commercial paper	$	3,098	$	1	$	—		$	3,099
Total	$	3,098	$	1	$	—		$	3,099
Investments due in 4-12 months:
Corporate securities	$	6,007	$	33	$	—		$	6,040
Total	$	6,007	$	33	$	—		$	6,040
Investments due between 12 months and 5-years:
Corporate securities	$	102,963	$	202	$	(26	)	$	103,139
Total	$	102,963	$	202	$	(26	)	$	103,139
Total investment securities	$	112,068	$	236	$	(26	)	$	112,278

Schedule of Accounts Receivable [Table Text Block]

Accounts Receivable (in thousands):

	March 31, 2014			December 31, 2013
Accounts receivable trade	$	47,842		$	42,410
Accrued ship and debit and rebate claims	(31,316		)	(29,901		)
Allowance for doubtful accounts	(105		)	(120		)
Total	$	16,421		$	12,389

Schedule of Prepaid Expenses and Other Current Assets [Table Text Block]

Prepaid Expenses and Other Current Assets (in thousands):

	March 31, 2014		December 31, 2013
Prepaid legal fees	$	5,129	$	6,267
Prepaid income tax	4,048		7,521
Prepaid maintenance agreements	725		947
Interest receivable	678		519
Supplier prepayment	1,511		757
Other	4,936		2,621
Total	$	17,027	$	18,632

Changes in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Changes in accumulated other comprehensive income (loss) for the quarter ended March 31, 2013 (in thousands):

	Unrealized Gains and Losses on Available-for-Sale Securities			Defined Benefit Pension Items				Foreign Currency Items			Total
Beginning balance at December 31, 2012	$	138		$	(560	)		$	129		$	(293	)
Other comprehensive income before reclassifications	(54		)	—				(151		)	(205		)
Amounts reclassified from accumulated other comprehensive income	—			14			(1)	—			14
Net-current period other comprehensive income	(54		)	14				(151		)	(191		)
Ending balance at March 31, 2013	$	84		$	(546	)		$	(22	)	$	(484	)

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(1) This component of accumulated other comprehensive income is included in the computation of net periodic pension cost for the three months ended March 31, 2013.

Changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2014 (in thousands):

	Unrealized Gains and Losses on Available-for-Sale Securities		Defined Benefit Pension Items				Foreign Currency Items			Total
Beginning balance at December 31, 2013	$	210	$	(780	)		$	100		$	(470	)
Other comprehensive income (loss) before reclassifications	147		—				(6		)	141
Amounts reclassified from accumulated other comprehensive income (loss)	—		14			(1)	—			14
Net-current period other comprehensive income (loss)	147		14				(6		)	155
Ending balance at March 31, 2014	$	357	$	(766	)		$	94		$	(315	)

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(1) This component of accumulated other comprehensive income is included in the computation of net periodic pension cost for the three months ended March 31, 2014.