Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

v3.20.2
Income Taxes - Narrative (Details) - USD ($)
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Income Tax Disclosure [Abstract]      
Tax benefit related to TCJA     $ 9,847,000
Effective income tax rate reconciliation, at federal statutory income tax rate, percent 21.00% 21.00% 24.53%