Summary of Significant Accounting Policies (Other Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Restricted assets	$ 25,907	$ 1,551
Prepaid pension costs	38,100	44,585
Other assets	31,310	30,549
Total other assets	$ 95,317	$ 76,685