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SHARE-BASED COMPENSATION
 6 Months Ended
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
SHARE-BASED COMPENSATION
SHARE-BASED COMPENSATION
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



Restricted Stock Units
During the six months ended March 31, 2017, 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, 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



Performance Units
During the six months ended March 31, 2017, 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, 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 Options
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
)