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FAIR VALUE MEASUREMENTS (Tables)
 12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Financial Assets and Liabilities Accounted For at Fair Value on Recurring Basis
The Company’s carrying and estimated fair value of debt, at December 31, 2015 and 2014 were as follows:
 
 
 
December 31, 2015
 
December 31, 2014
 
 
 
Carrying
 
Fair Value
 
Carrying
 
Fair Value
 
 
 
Value
 
Level 1
 
Level 2
 
Level 3
 
Value
 
Level 1
 
Level 2
 
Level 3
 
Instrument
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Convertible senior notes
 
$
121,268
 
$
-
 
$
155,694
 
$
-
 
$
134,601
 
$
-
 
$
188,490
 
$
-
 
Term loan credit agreement
 
 
190,535
 
 
-
 
 
190,442
 
 
-
 
 
189,027
 
 
-
 
 
192,845
 
 
-
 
Industrial revenue bond
 
 
1,149
 
 
-
 
 
-
 
 
1,149
 
 
1,645
 
 
-
 
 
-
 
 
1,645
 
Capital lease obligations
 
 
2,681
 
 
-
 
 
-
 
 
2,681
 
 
7,254
 
 
-
 
 
-
 
 
7,254
 
 
 
$
315,633
 
$
-
 
$
346,136
 
$
3,830
 
$
332,527
 
$
-
 
$
381,335
 
$
8,899