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Stock Compensation (Tables)
 12 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Compensation costs included in net income
The following table presents the compensation costs related to our stock compensation arrangements:
 
Fiscal Year Ended September 30,
 
2017
 
2016
 
2015
 
 
 
 
 
 
 
(in thousands)
Share-based compensation costs
$
5,866

 
$
5,346

 
$
2,374

Income tax benefits on share-based compensation
(841
)
 
(963
)
 
—

Net share-based compensation expense
$
5,025

 
$
4,383

 
$
2,374
Summary of restricted stock award activity
The following table presents a summary of stock compensation activity:
 
Shares
 
Weighted
Average
Grant Date
Fair Value
 
 
 
 
Outstanding as of September 30, 2016
2,411,500

 
$
5.77

Granted
1,137,340

 
9.57

Released (a)
(366,775
)
 
6.55

Forfeited
(768,282
)
 
(2.53
)
Outstanding as of September 30, 2017
2,413,783

 
$
6.53

(a)
68,087 shares were withheld to satisfy related federal income tax withholding.
The following table presents a summary of the fair value of shares granted:
 
Fiscal Year Ended September 30,
 
 
2017
 
2016
 
2015
 
 
 
 
 
 
 
 
 
(in millions except per share amounts)
 
Weighted average grant-date fair value per share granted (a)
$
9.57

 
$
3.53

 
$
10.34

(b)
Total grant date fair value of shares vested
$
3.8

 
$
2.3

 
$
1.8

 

(a)
Awards with performance and time-based vesting provisions are generally valued based upon the underlying share price as of the issuance date. Awards with market-conditioned vesting provisions were valued using a Monte Carlo simulation model.
(b)
Fiscal 2015 shares granted exclude phantom share-based awards. Including these shares, weighted average grant-date fair value was $5.69 per share.