Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 8,302	$ 14,189	$ 16,240	$ 21,152	$ 21,623	$ 22,186	$ 38,731	$ 64,961
Income allocated to participating securities	(4)			(11)			(18)	(35)
Net income available to common stockholders, basic	8,298			21,141			38,713	64,926
Net Income available to common stockholders, diluted	$ 8,298			$ 21,141			$ 38,713	$ 64,926
Total basic average common shares outstanding	133,198,755			135,724,658			133,668,764	135,675,959
Effect of dilutive stock options	0			0			0	0
Total diluted average common shares outstanding	133,198,755			135,724,658			133,668,764	135,675,959
Net EPS
Basic	$ 0.06			$ 0.16			$ 0.29	$ 0.48
Diluted	$ 0.06			$ 0.16			$ 0.29	$ 0.48
Antidilutive stock options, excluded from the diluted average common shares outstanding calculation	368,803			507,115			373,473	531,305