Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 4,299	$ 1,238
Earnings per common share
Average common share outstanding (denominator) (in shares)	55,361	55,666
Earnings per common share (in dollars per share)	$ 0.08	$ 0.02
Diluted earnings per common share
Average common share outstanding (denominator) (in shares)	55,361	55,666
Dilutive effect of restricted stock and convertible notes (in shares)	67	21
Diluted average common shares outstanding (denominator) (in shares)	55,428	55,687
Diluted earnings per common share (in dollars per share)	$ 0.08	$ 0.02
Potential common shares excluded from the calculation of diluted earnings per share above, Restricted stock (in shares)	657	2,216