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Accumulated Other Comprehensive Income (Loss)
 9 Months Ended
Sep. 30, 2024
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:
Three months endedThree months ended
September 30, 2024September 30, 2023
(in thousands)Before TaxIncome TaxNetBefore TaxIncome TaxNet
Investment securities:
AOCI (loss), beginning of period$(30,405)$(6,385)$(24,020)$(55,497)$(11,654)$(43,843)
OCI (loss) before reclassifications25,586 5,373 20,213 (10,064)(2,114)(7,950)
Realized investment (gains) losses(142)(30)(112)2,480 521 1,959 
Impairment losses159 33 126 113 24 89 
OCI (loss)25,603 5,376 20,227 (7,471)(1,569)(5,902)
AOCI (loss), end of period$(4,802)$(1,009)$(3,793)$(62,968)$(13,223)$(49,745)
Pension and other postretirement plans:
AOCI, beginning of period$8,730 $1,833 $6,897 $50,244 $10,551 $39,693 
OCI (loss) before reclassifications(606)(127)(479)— — — 
Amortization of prior service costs413 87 326 362 76 286 
Amortization of net actuarial gain(1,695)(356)(1,339)(3,833)(805)(3,028)
Settlement gain(59)(13)(46)— — — 
OCI (loss)(1,947)(409)(1,538)(3,471)(729)(2,742)
AOCI, end of period$6,783 $1,424 $5,359 $46,773 $9,822 $36,951 
Total
AOCI (loss), beginning of period$(21,675)$(4,552)$(17,123)$(5,253)$(1,103)$(4,150)
Investment securities25,603 5,376 20,227 (7,471)(1,569)(5,902)
Pension and other postretirement plans(1,947)(409)(1,538)(3,471)(729)(2,742)
OCI (loss)23,656 4,967 18,689 (10,942)(2,298)(8,644)
AOCI (loss), end of period$1,981 $415 $1,566 $(16,195)$(3,401)$(12,794)
Nine months endedNine months ended
September 30, 2024September 30, 2023
(in thousands)Before TaxIncome TaxNetBefore TaxIncome TaxNet
Investment securities:
AOCI (loss), beginning of period$(31,402)$(6,595)$(24,807)$(66,571)$(13,980)$(52,591)
OCI (loss) before reclassifications23,405 4,915 18,490 (4,509)(947)(3,562)
Realized investment losses2,495 524 1,971 6,195 1,301 4,894 
Impairment losses700 147 553 1,917 403 1,514 
OCI26,600 5,586 21,014 3,603 757 2,846 
AOCI (loss), end of period$(4,802)$(1,009)$(3,793)$(62,968)$(13,223)$(49,745)
Pension and other postretirement plans:
AOCI, beginning of period$14,439 $3,032 $11,407 $57,186 $12,009 $45,177 
OCI (loss) before reclassifications(2,337)(491)(1,846)— — — 
Amortization of prior service costs1,199 252 947 1,085 228 857 
Amortization of net actuarial gain(5,180)(1,088)(4,092)(11,498)(2,415)(9,083)
Settlement gain(1,338)(281)(1,057)— — — 
OCI (loss)(7,656)(1,608)(6,048)(10,413)(2,187)(8,226)
AOCI, end of period$6,783 $1,424 $5,359 $46,773 $9,822 $36,951 
Total
AOCI (loss), beginning of period$(16,963)$(3,563)$(13,400)$(9,385)$(1,971)$(7,414)
Investment securities26,600 5,586 21,014 3,603 757 2,846 
Pension and other postretirement plans(7,656)(1,608)(6,048)(10,413)(2,187)(8,226)
OCI (loss)18,944 3,978 14,966 (6,810)(1,430)(5,380)
AOCI (loss), end of period$1,981 $415 $1,566 $(16,195)$(3,401)$(12,794)