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DEBT (Tables)
 3 Months Ended
Mar. 31, 2015
Debt Disclosure [Abstract]  
Long-Term Debt
Long-term debt consists of the following (in thousands):
 
 
 
March 31,
 
December 31,
 
 
 
2015
 
2014
 
Convertible senior notes
 
$
150,000
 
$
150,000
 
Term loan credit agreement
 
 
192,845
 
 
192,845
 
Industrial revenue bond
 
 
1,522
 
 
1,645
 
 
 
$
344,367
 
$
344,490
 
Less: unamortized discount
 
 
(15,309)
 
 
(19,217)
 
Less: current portion
 
 
(2,429)
 
 
(496)
 
 
 
$
326,629
 
$
324,777
 
Equity and Liability Components of Notes
The following table summarizes information about the equity and liability components of the Notes (dollars in thousands). The fair value of the Notes outstanding were measured based on quoted market prices.
 
 
 
March 31,
 
December 31,
 
 
 
2015
 
2014
 
Principal amount of the Notes outstanding
 
$
150,000
 
$
150,000
 
Unamortized discount of liability component
 
 
(14,362)
 
 
(15,399)
 
Net carrying amount of liability component
 
 
135,638
 
 
134,601
 
Less: current portion
 
 
-
 
 
-
 
Long-term debt
 
$
135,638
 
$
134,601
 
Carrying value of equity component, net of issuance costs
 
$
20,993
 
$
20,993
 
Remaining amortization period of discount on the liability component
 
 
3.1 years
 
 
3.3 years
 
Contractual Coupon Interest Expense and Accretion Of Discount On Liability
Contractual coupon interest expense and accretion of discount on the liability component for the Notes for the three month periods ended March 31, 2015 and 2014 were as follow (in thousands):
 
 
 
Three Months Ended March 31,
 
 
 
2015
 
2014
 
Contractual coupon interest expense
 
$
1,266
 
$
1,266
 
Accretion of discount on the liability component
 
$
1,037
 
$
968