Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2022

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 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 Statements of Operations where net income is presented, are as follows for the year ended December 31:

(in thousands)	2022						2021						2020
	Before Tax		Income Tax		Net		Before Tax		Income Tax		Net		Before Tax		Income Tax		Net
Investment securities:
AOCI, beginning of year	$	7,722	$	1,621	$	6,101	$	29,384	$	6,171	$	23,213	$	5,664	$	1,189	$	4,475
OCI (loss) before reclassifications	(89,010)		(18,692)		(70,318)		(16,474)		(3,460)		(13,014)		22,074		4,636		17,438
Realized investment losses (gains)	14,050		2,951		11,099		(5,131)		(1,078)		(4,053)		(1,335)		(280)		(1,055)
Impairment losses (recoveries)	667		140		527		(57)		(12)		(45)		2,981		626		2,355
OCI (loss)	(74,293)		(15,601)		(58,692)		(21,662)		(4,550)		(17,112)		23,720		4,982		18,738
AOCI (loss), end of year	$	(66,571)	$	(13,980)	$	(52,591)	$	7,722	$	1,621	$	6,101	$	29,384	$	6,171	$	23,213
Pension and other postretirement plans:
AOCI (loss), beginning of year	$	(39,734)	$	(8,345)	$	(31,389)	$	(128,300)	$	(26,944)	$	(101,356)	$	(153,600)	$	(32,257)	$	(121,343)
OCI before reclassifications	88,148		18,511		69,637		71,032		14,917		56,115		11,832		2,485		9,347
Amortization of prior service costs (1)	1,443		303		1,140		1,428		300		1,128		1,343		282		1,061
Amortization of net actuarial loss (1)	7,329		1,540		5,789		16,106		3,382		12,724		12,125		2,546		9,579
OCI	96,920		20,354		76,566		88,566		18,599		69,967		25,300		5,313		19,987
AOCI (loss), end of year	$	57,186	$	12,009	$	45,177	$	(39,734)	$	(8,345)	$	(31,389)	$	(128,300)	$	(26,944)	$	(101,356)
Total
AOCI (loss), beginning of year	$	(32,012)	$	(6,724)	$	(25,288)	$	(98,916)	$	(20,773)	$	(78,143)	$	(147,936)	$	(31,068)	$	(116,868)
Investment securities	(74,293)		(15,601)		(58,692)		(21,662)		(4,550)		(17,112)		23,720		4,982		18,738
Pension and other postretirement plans	96,920		20,354		76,566		88,566		18,599		69,967		25,300		5,313		19,987
OCI	22,627		4,753		17,874		66,904		14,049		52,855		49,020		10,295		38,725
AOCI (loss), end of year	$	(9,385)	$	(1,971)	$	(7,414)	$	(32,012)	$	(6,724)	$	(25,288)	$	(98,916)	$	(20,773)	$	(78,143)

(1)These components of AOCI (loss) are included in the computation of net periodic pension cost. See Note 9, "Postretirement Benefits", for additional information.