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FAIR VALUE MEASUREMENTS (Tables)
 12 Months Ended
Dec. 31, 2017
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, 2017 and December 31, 2016 were as follows (in thousands):
 
 
 
December 31, 2017
 
December 31, 2016
 
 
 
Carrying
 
Fair Value
 
Carrying
 
Fair Value
 
 
 
Value
 
Level 1
 
Level 2
 
Level 3
 
Value
 
Level 1
 
Level 2
 
Level 3
 
Instrument
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Convertible senior notes due 2018
 
$
44,046
 
$
-
 
$
83,605
 
$
-
 
$
46,768
 
$
-
 
$
69,721
 
$
-
 
Senior notes due 2025
 
 
319,377
 
 
-
 
 
328,250
 
 
-
 
 
-
 
 
-
 
 
-
 
 
-
 
Term loan credit agreement
 
 
186,620
 
 
-
 
 
188,048
 
 
-
 
 
188,540
 
 
-
 
 
189,470
 
 
-
 
Other debt
 
 
67
 
 
-
 
 
-
 
 
67
 
 
625
 
 
-
 
 
-
 
 
625
 
Capital lease obligations
 
 
1,302
 
 
-
 
 
-
 
 
1,302
 
 
1,903
 
 
-
 
 
-
 
 
1,903
 
 
 
$
551,412
 
$
-
 
$
599,903
 
$
1,369
 
$
237,836
 
$
-
 
$
259,191
 
$
2,528