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EARNINGS PER SHARE (Tables)
 6 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Reconciliation of shares used in the basic and diluted net income per share computation
The following tables reflect a reconciliation of the shares used in the basic and diluted net income per share computation for the three months ended March 31, 2018 and April 1, 2017: 
 
Three months ended
(in thousands, except per share data)
March 31, 2018
 
April 1, 2017
As Restated
 
Basic
 
Diluted
 
Basic
 
Diluted
NUMERATOR:
 

 
 

 
 

 
 

Net income
$
36,313

 
$
36,313

 
$
32,670

 
$
32,670

DENOMINATOR:
 

 
 

 
 

 
 

Weighted average shares outstanding - Basic
70,361

 
70,361

 
70,964

 
70,964

Stock options
 

 
1

 
 

 
19

Time-based restricted stock
 

 
634

 
 

 
612

Market-based restricted stock
 

 
429

 
 

 
675

Weighted average shares outstanding - Diluted
 

 
71,425

 
 

 
72,270

EPS:
 

 
 

 
 

 
 

Net income per share - Basic
$
0.52

 
$
0.52

 
$
0.46

 
$
0.46

Effect of dilutive shares
 

 
(0.01
)
 
 

 
(0.01
)
Net income per share - Diluted
 

 
$
0.51

 
 

 
$
0.45

  
 
Six months ended
(in thousands, except per share data)
March 31, 2018
 
April 1, 2017
As Restated
 
Basic
 
Diluted
 
Basic
 
Diluted
NUMERATOR:
 

 
 

 
 

 
 

Net (loss)/income
$
(33,215
)
 
$
(33,215
)
 
$
50,066

 
$
50,066

DENOMINATOR:
 

 
 

 
 

 
 

Weighted average shares outstanding - Basic
70,467

 
70,467

 
70,909

 
70,909

Stock options
 
 
—

 
 

 
23

Time-based restricted stock
 
 
—

 
 

 
510

Market-based restricted stock
 
 
—

 
 

 
597

Weighted average shares outstanding - Diluted
 

 
70,467

 
 

 
72,039

EPS:
 

 
 

 
 

 
 

Net (loss)/income per share - Basic
$
(0.47
)
 
$
(0.47
)
 
$
0.71

 
$
0.71

Effect of dilutive shares
 

 
—

 
 

 
(0.02
)
Net (loss)/income per share - Diluted
 

 
$
(0.47
)
 
 

 
$
0.69