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SHARE-BASED COMPENSATION (Tables)
 6 Months Ended
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Unrecognized Compensation Cost
A summary of our share-based compensation expense recognized during the six months ended March 31, 2017 and 2016 and unrecognized compensation cost and remaining weighted-average service period as of March 31, 2017 and 2016 is as follows:
 
Six Months Ended March 31,
(In thousands, except average service periods)
2017
 
2016
Share-based compensation recognized
$
7,566

 
$
5,009

Unrecognized compensation cost, net of estimated forfeitures
22,901

 
21,469

Remaining weighted-average service period (years)
1.8

 
2.1
Summary of Restricted Stock Activity
A summary of our restricted stock activity for the six months ended March 31, 2017 is as follows:
 
Number of Shares (000s)
 
Weighted Average Fair Value
Unvested as of October 1, 2016
1,515

 
$
21.96

Granted
1,126

 
7.92

Vested
(193
)
 
42.44

Forfeited
(44
)
 
21.29

Unvested as of March 31, 2017
2,404

 
13.75
Summary of Performance Stock Activity
A summary of Performance Units stock activity for the six months ended March 31, 2017 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 March 31, 2017
723

 
15.29
Stock Option Activity
A summary of stock option activity for the six months ended March 31, 2017 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
(62
)
 
26.02

 
—

 
(1,025
)
Outstanding as of March 31, 2017
555

 
36.53

 
3.2

 
(14,989
)
Exercisable as of March 31, 2017
555

 
36.53

 
3.2

 
(14,989
)