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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 534,783	$ 494,308	$ 496,049
Unrealized holding (losses) gains on available for sale securities:
Unrealized holding (losses) gains arising during period	(32,055)	112,743	(861,470)
Tax effect	7,681	(19,458)	206,281
Reclassification adjustment for (gains) loss included in net income	50	(43)	(30)
Tax effect	(12)	10	7
Net of tax amount	(24,336)	93,252	(655,212)
Change in the retiree medical plan obligation:
Change in the retiree medical plan obligation during period	(110)	1,442	(1,110)
Tax effect	27	(356)	272
Reclassification adjustment for changes included in net income	45	285	143
Tax effect	(11)	(71)	(35)
Net of tax amount	(49)	1,300	(730)
Other comprehensive (loss) income, net of tax	(24,385)	94,552	(655,942)
Comprehensive income (loss)	$ 510,398	$ 588,860	$ (159,893)

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