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Income Taxes - Components of Income Taxes Provision (Benefit) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Current provision: |  |  |  |  |  |  |  |
Federal |  |  |  |  |  | $ 496 | $ 209 | $ 46
State |  |  |  |  |  | 73 | 87 | 45
Total current provision |  |  |  |  |  | 569 | 296 | 91
Deferred provision (benefit): |  |  |  |  |  |  |  |
Federal |  |  |  |  |  | 11,691 | (22,056) |
State |  |  |  |  |  | (52) | (5,654) |
Total deferred provision (benefit) |  |  |  |  |  | 11,639 | (27,710) |
Total income tax provision (benefit) | $ 678 | $ 9,285 | $ 1,497 | $ 748 | $ (27,414) | $ 12,208 | $ (27,414) | $ 91

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