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Per Share Data (Tables)
 12 Months Ended
Sep. 30, 2014
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The calculations of basic and diluted net income (loss) per share for each of the three years ended September 30, 2014, 2013 and 2012 are as follows:
 
Years Ended September 30,
 
2014
 
2013
 
2012
 
(in thousands, except per share data)
Numerator for basic and diluted net income (loss) per share:
 
 
 
 
 
Net income (loss)
$
23,265

 
$
17,548

 
$
(2,718
)
Denominator for basic net income (loss) per share:
 
 
 
 
 
Weighted average common shares outstanding
30,037

 
28,223

 
27,120

Dilutive effect of stock options and awards
1,586

 
1,471

 
—

Denominator for diluted net income (loss) per share
31,623

 
29,694

 
27,120

Basic net income (loss) per share
$
0.77

 
$
0.62

 
$
(0.10
)
Diluted net income (loss) per share
$
0.74

 
$
0.59

 
$
(0.10
)