Other Income and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Other income:
Interest income	$ 6,026	$ 1,642
Miscellaneous	51	62
Total other income	6,077	1,704
Other expense:
Non-operating costs	(2,640)	(2,453)
Investment losses — net	(1,061)	(681)
Miscellaneous	(430)	(288)
Total other expense	(4,131)	(3,422)
APS
Other income:
Interest income	5,024	1,099
Miscellaneous	51	53
Total other income	5,075	1,152
Other expense:
Non-operating costs	(2,188)	(1,561)
Miscellaneous	(429)	(288)
Total other expense	$ (2,617)	$ (1,849)