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Share-Based Compensation
 6 Months Ended
Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-Based Compensation
SHARE-BASED COMPENSATION
A summary of our share-based compensation expense during the six months ended March 31, 2016 and 2015 is as follows:
 
Six Months Ended March 31,
(In thousands, except average service periods)
2016
 
2015
Share-based compensation recognized
$
5,009

 
$
8,119

Unrecognized compensation cost, net of estimated forfeitures
21,469

 
26,310

Remaining weighted-average service period (years)
2.1

 
2.0



Restricted Stock Units

During the six months ended March 31, 2016, we granted to certain employees and our non-employee directors, restricted stock units that are subject to vesting conditions. The grant date fair value of these awards was based on the fair value of our common stock on the date of grant. A summary of our restricted stock activity for the six months ended March 31, 2016 is as follows:
 
Number of Shares (000s)
 
Weighted Average Fair Value
Unvested as of October 1, 2015
711

 
$
43.14

Granted
642

 
14.32

Vested
(190
)
 
44.96

Forfeited
(76
)
 
32.10

Unvested as of March 31, 2016
1,087

 
26.15



Performance Units
During the six months ended March 31, 2016, we granted to certain employees share-based awards that are subject to market-based performance conditions ("Performance Units"). The grant date fair value of these performance units was determined through use of the Monte Carlo simulation method. A summary of Performance Units stock activity for the six months ended March 31, 2016 is as follows:
 
 
Number of Shares (000s)
 
Weighted Average Fair Value
Unvested as of October 1, 2015
240

 
$
43.73

Granted
254

 
15.63

Vested
—

 
—

Forfeited
—

 
—

Unvested as of March 31, 2016
494

 
26.69



Stock Options
A summary of stock option activity for the six months ended March 31, 2016 is as follows:
 
Number of
Options
(000s)
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value  (000s)
Outstanding as of October 1, 2015
685

 
$
34.90

 
 
 
 
Granted
—

 
—

 
 
 
 
Exercised
—

 
—

 
 
 
—

Forfeited
—

 
—

 
 
 
 
Expired
(17
)
 
27.25

 
 
 
 
Outstanding as of March 31, 2016
668

 
35.10

 
3.8
 
(17,325
)
Exercisable as of March 31, 2016
668

 
35.10

 
3.8
 
(17,325
)