Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2022

Stockholders' Equity Note [Abstract]

Accumulated Other Comprehensive Income (Loss) [Table Text Block]

A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):

	Unrealized Gain (Loss) on
	Available for Sale Securities		Investment Securities Transferred from AFS		Employee Benefit Plans		Total
Balance, Dec. 31, 2020	$	335,032	$	—	$	836	$	335,868
Net change in unrealized gain (loss)	(216,176)		—		—		(216,176)
Reclassification adjustments included in earnings:
Gain on available for sale securities, net	(3,152)		—		—		(3,152)
Other comprehensive loss, before income taxes	(219,328)		—		—		(219,328)
Federal and state income taxes	(52,632)		—		—		(52,632)
Other comprehensive loss, net of income taxes	(166,696)		—		—		(166,696)
Balance, September 30, 2021	$	168,336	$	—	$	836	$	169,172
Balance, Dec. 31, 2021	$	69,775	$	—	$	2,596	$	72,371
Net change in unrealized gain (loss)	(1,293,661)		—		—		(1,293,661)
Transfer of net unrealized loss from AFS to investment securities	267,509		(267,509)		—		—
Reclassification adjustments included in earnings:
Interest revenue, Investment securities	—		24,130		—		24,130
Operating expense, Personnel	—		—		(3,483)		(3,483)
Gain on available for sale securities, net	(3,017)		—		—		(3,017)
Other comprehensive loss, before income taxes	(1,029,169)		(243,379)		(3,483)		(1,276,031)
Federal and state income taxes	(240,868)		(56,960)		(887)		(298,715)
Other comprehensive loss, net of income taxes	(788,301)		(186,419)		(2,596)		(977,316)
Balance, September 30, 2022	$	(718,526)	$	(186,419)	$	—	$	(904,945)