Other Income and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Other income:
Interest income	$ 9,515	$ 1,785	$ 21,946	$ 5,118
Gain on sale of BCE (Note 16)	6,423	0	6,423	0
Miscellaneous	3	434	55	487
Total other income	15,941	2,219	28,424	5,605
Other expense:
Non-operating costs	(3,322)	(2,956)	(9,319)	(9,110)
Investment losses — net	(870)	(935)	(2,364)	(2,191)
Miscellaneous	(2,780)	(2,854)	(4,233)	(3,450)
Total other expense	(6,972)	(6,745)	(15,916)	(14,751)
APS
Other income:
Interest income	8,717	1,402	19,432	3,897
Miscellaneous	3	259	55	312
Total other income	8,720	1,661	19,487	4,209
Other expense:
Non-operating costs	(3,053)	(2,369)	(8,352)	(6,407)
Miscellaneous	(580)	(654)	(2,033)	(1,250)
Total other expense	$ (3,633)	$ (3,023)	$ (10,385)	$ (7,657)