Other Assets (Schedule of other assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Other Assets [Abstract]
Deposit with OAS	$ 48,422	$ 50,274
Cash surrender value life insurance	3,640	3,636
Noncurrent advances and deposits	2,196	2,368
Deferred debt costs	1,646	1,703
Other long-term receivable	1,607	1,826
Other assets	$ 57,511	$ 59,807