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NET INCOME PER SHARE (Tables)
 12 Months Ended
Jan. 01, 2017
Earnings Per Share [Abstract]  
Schedule of adjusted net income and diluted common shares
Diluted common shares were calculated as follows (in thousands, except per share amounts):
 
Years ended
 
2016
 
2015
 
2014
Net income (loss)
$
(15,251
)
 
$
71,247

 
$
65,675

 
 
 
 
 
 
Weighted average number of common shares used in basic net income (loss) per common share
41,648

 
41,226

 
40,734

Dilutive effect of non-vested restricted stock
—

 
396

 
442

Weighted average number of common shares used in diluted net income (loss) per common share
41,648

 
41,622


41,176

Net income (loss) per common share:
 
 
 
 
 
Basic
$
(0.37
)
 
$
1.73

 
$
1.61

Diluted
$
(0.37
)
 
$
1.71

 
$
1.59

 
 
 
 
 
 
Anti-dilutive shares
—

 
89

 
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