Stockholders' Equity - Schedule of Treasury Stock Purchases and Issuance (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Shares
Beginning Balance (in shares)	939,632
Purchased (in shares)	7,000
Issued to employees and directors (in shares)	(5,687)
Ending Balance (in shares)	940,945
Cost
Beginning Balance	$ 31,943
Purchased	238	$ 25,576
Issued to employees and directors	(225)
Ending Balance	$ 31,956