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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss)
 
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)202120202019
Before TaxIncome TaxNetBefore TaxIncome TaxNetBefore TaxIncome TaxNet
Investment securities:
AOCI (loss), beginning of year$29,384 $6,171 $23,213 $5,664 $1,189 $4,475 $(9,169)$(1,926)$(7,243)
OCI (loss) before reclassifications(16,474)(3,460)(13,014)22,074 4,636 17,438 19,257 4,044 15,213 
Realized investment gains(5,131)(1,078)(4,053)(1,335)(280)(1,055)(4,619)(970)(3,649)
Impairment (recoveries) losses(57)(12)(45)2,981 626 2,355 195 41 154 
OCI (loss)(21,662)(4,550)(17,112)23,720 4,982 18,738 14,833 3,115 11,718 
AOCI, end of year$7,722 $1,621 $6,101 $29,384 $6,171 $23,213 $5,664 $1,189 $4,475 
Pension and other postretirement plans:
AOCI (loss), beginning of year$(128,300)$(26,944)$(101,356)$(153,600)$(32,257)$(121,343)$(155,749)$(32,708)$(123,041)
OCI (loss) before reclassifications71,032 14,917 56,115 11,832 2,485 9,347 (4,085)(858)(3,227)
Amortization of prior service costs (1)
1,428 300 1,128 1,343 282 1,061 1,394 293 1,101 
Amortization of net actuarial loss (1)
16,106 3,382 12,724 12,125 2,546 9,579 4,840 1,016 3,824 
OCI 88,566 18,599 69,967 25,300 5,313 19,987 2,149 451 1,698 
AOCI (loss), end of year$(39,734)$(8,345)$(31,389)$(128,300)$(26,944)$(101,356)$(153,600)$(32,257)$(121,343)
Total
AOCI (loss), beginning of year$(98,916)$(20,773)$(78,143)$(147,936)$(31,068)$(116,868)$(164,918)$(34,634)$(130,284)
Investment securities(21,662)(4,550)(17,112)23,720 4,982 18,738 14,833 3,115 11,718 
Pension and other postretirement plans88,566 18,599 69,967 25,300 5,313 19,987 2,149 451 1,698 
OCI 66,904 14,049 52,855 49,020 10,295 38,725 16,982 3,566 13,416 
AOCI (loss), end of year$(32,012)$(6,724)$(25,288)$(98,916)$(20,773)$(78,143)$(147,936)$(31,068)$(116,868)

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