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LONG-TERM DEBT (Tables)
6 Months Ended
Jul. 01, 2017
Debt Disclosure [Abstract]  
Schedule of long-term debt
Long-term debt consisted of the following:
(dollars in thousands)
July 1, 2017
 
December 31, 2016
 
July 2, 2016
Senior notes at amounts repayable
$
400,000

 
$
400,000

 
$
400,000

Less unamortized issuance-related costs for senior notes
(4,154
)
 
(4,601
)
 
(5,036
)
      Senior notes, net
395,846

 
395,399

 
394,964

Secured revolving credit facility
266,000

 
184,977

 
185,714

Total long-term debt, net
$
661,846

 
$
580,376

 
$
580,678