Basis of Accounting and Consolidation - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Realized gain (loss) on available-for-sale securities	$ (6)	$ 2	$ (52)	$ 2
Tax effect	(4,786)	(5,205)	(10,516)	(9,859)
Total reclassifications out of accumulated other comprehensive income (loss)	(5)	1	(38)	1
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Realized gain (loss) on available-for-sale securities	(6)	2	(52)	2
Tax effect	$ 1	$ (1)	$ 14	$ (1)