Income Taxes - Components of Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Domestic	$ 10,930	$ 2,297	$ 14,244	$ (4,676)
Foreign	6,449	3,808	14,661	2,267
Income (loss) before income taxes	$ 17,379	$ 6,105	$ 28,905	$ (2,409)

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

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