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Income Taxes - Schedule of Provision for Income Tax (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Current: |  |  |  |  |  |  |  |  |  |  |
Federal income tax |  |  |  |  |  |  |  |  | $ 7,314 | $ 1,961 | $ 102
State income tax |  |  |  |  |  |  |  |  | 2,202 | 384 | 0
Total current |  |  |  |  |  |  |  |  | 9,516 | 2,345 | 102
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal income tax |  |  |  |  |  |  |  |  | 2,995 | (3,917) | (3,286)
State income tax |  |  |  |  |  |  |  |  | 272 | 1,962 | (662)
Total deferred |  |  |  |  |  |  |  |  | 3,267 | (1,955) | (3,948)
Income taxes provision (benefit) | $ 5,701 | $ 5,483 | $ 2,228 | $ (629) | $ (284) | $ 4,941 | $ 8,150 | $ (12,417) | $ 12,783 | $ 390 | $ (3,846)

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