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SHARE-BASED COMPENSATION (Tables)
 3 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Unrecognized Compensation Cost
A summary of our share-based compensation expense during the three months ended December 31, 2016 and 2015 is as follows:
 
Three Months Ended December 31,
(In thousands, except average service periods)
2016
 
2015
Share-based compensation recognized
$
3,655

 
$
2,371

Unrecognized compensation cost, net of estimated forfeitures
26,666

 
25,940

Remaining weighted-average service period (years)
2.0

 
2.3
Summary of Restricted Stock Activity
A summary of our restricted stock activity for the three months ended December 31, 2016 is as follows:
 
Number of Shares (000s)
 
Weighted Average Fair Value
Unvested as of October 1, 2016
1,515

 
$
21.96

Granted
1,099

 
7.83

Vested
(144
)
 
54.01

Forfeited
(36
)
 
27.72

Unvested as of December 31, 2016
2,434

 
13.73
Summary of Performance Stock Activity
A summary of Performance Units stock activity for the three months ended December 31, 2016 is as follows:
 
 
Number of Shares (000s)
 
Weighted Average Fair Value
Unvested as of October 1, 2016
426

 
$
26.69

Granted
360

 
8.50

Vested
(47
)
 
53.55

Forfeited
(16
)
 
53.55

Unvested as of December 31, 2016
723

 
15.29
Stock Option Activity
A summary of stock option activity for the three months ended December 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, 2016
617

 
$
35.47

 
3.4

 
$
(16,533
)
Granted
—

 
—

 
—

 
—

Exercised
—

 
—

 
—

 
—

Forfeited
—

 
—

 
—

 
—

Expired
(53
)
 
24.99

 
—

 
(633
)
Outstanding as of December 31, 2016
564

 
36.46

 
3.5

 
(13,159
)
Exercisable as of December 31, 2016
564

 
36.46

 
3.5

 
(13,159
)