Leases (Lease-Related Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Assets:
Operating lease assets	$ 23,417	$ 19,370
Finance lease assets	1,854	781
Total lease assets	25,271	20,151
Current liabilities:
Operating lease liabilities	4,930	5,260
Finance lease liabilities	459	728
Noncurrent liabilities:
Operating lease liabilities	19,125	14,770
Finance lease liabilities	1,419	475
Total lease liabilities	$ 25,933	$ 21,233