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Stock Compensation - Compensation Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Compensation costs included in net income |  |  |
Total gross compensation costs | $ 5,346 | $ 2,374 | $ 6,845
Total income tax benefits | (963) | 0 | (3,576)
Net compensation expense | 4,383 | 2,374 | 3,269
Phantom stock |  |  |
Compensation costs included in net income |  |  |
Total gross compensation costs | 0 | 3,932 | 0
Restricted stock |  |  |
Compensation costs included in net income |  |  |
Total gross compensation costs | 5,346 | (1,558) | 6,845
Total income tax benefits | $ (963) | $ 0 | $ (3,576)

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