Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2025

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component, Including Amounts Reclassified to Other Comprehensive Income (Loss) and the Related Line item in the Consolidated Statements of Operations Where Net Income is Presented

Changes in accumulated other comprehensive income ("AOCI") (loss) by component, including amounts reclassified to other comprehensive income ("OCI") (loss) and the related line item in the Consolidated Statements of Operations where net income is presented, are as follows for the year ended December 31:

(in thousands)	2025						2024						2023
	Before Tax		Income Tax		Net		Before Tax		Income Tax		Net		Before Tax		Income Tax		Net
Investment securities:
AOCI (loss), beginning of year	$	(22,442)	$	(4,714)	$	(17,728)	$	(31,402)	$	(6,595)	$	(24,807)	$	(66,571)	$	(13,980)	$	(52,591)
OCI before reclassifications	22,119		4,645		17,474		6,557		1,377		5,180		26,021		5,464		20,557
Realized investment (gains) losses	(53)		(11)		(42)		1,620		340		1,280		6,719		1,411		5,308
Impairment losses	1,884		396		1,488		783		164		619		2,429		510		1,919
OCI	23,950		5,030		18,920		8,960		1,881		7,079		35,169		7,385		27,784
AOCI (loss), end of year	$	1,508	$	316	$	1,192	$	(22,442)	$	(4,714)	$	(17,728)	$	(31,402)	$	(6,595)	$	(24,807)
Pension and other postretirement plans:
AOCI (loss), beginning of year	$	(37,802)	$	(7,939)	$	(29,863)	$	14,439	$	3,032	$	11,407	$	57,186	$	12,009	$	45,177
OCI (loss) before reclassifications	(28,154)		(5,912)		(22,242)		(45,655)		(9,588)		(36,067)		(28,862)		(6,061)		(22,801)
Amortization of prior service costs (1)	1,688		354		1,334		1,611		338		1,273		1,446		304		1,142
Amortization of net actuarial gain (1)	(2,519)		(529)		(1,990)		(6,859)		(1,440)		(5,419)		(15,331)		(3,220)		(12,111)
Settlement gain (1)	(572)		(120)		(452)		(1,338)		(281)		(1,057)		—		—		—
OCI (loss)	(29,557)		(6,207)		(23,350)		(52,241)		(10,971)		(41,270)		(42,747)		(8,977)		(33,770)
AOCI (loss), end of year	$	(67,359)	$	(14,146)	$	(53,213)	$	(37,802)	$	(7,939)	$	(29,863)	$	14,439	$	3,032	$	11,407
Total
AOCI (loss), beginning of year	$	(60,244)	$	(12,653)	$	(47,591)	$	(16,963)	$	(3,563)	$	(13,400)	$	(9,385)	$	(1,971)	$	(7,414)
Investment securities	23,950		5,030		18,920		8,960		1,881		7,079		35,169		7,385		27,784
Pension and other postretirement plans	(29,557)		(6,207)		(23,350)		(52,241)		(10,971)		(41,270)		(42,747)		(8,977)		(33,770)
OCI (loss)	(5,607)		(1,177)		(4,430)		(43,281)		(9,090)		(34,191)		(7,578)		(1,592)		(5,986)
AOCI (loss), end of year	$	(65,851)	$	(13,830)	$	(52,021)	$	(60,244)	$	(12,653)	$	(47,591)	$	(16,963)	$	(3,563)	$	(13,400)

(1)These components of AOCI (loss) are included in the computation of net periodic pension cost (income). See Note 10, "Postretirement Benefits", for additional information.