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Supplemental Information about Changes to Accumulated Other Comprehensive Income
 9 Months Ended
Sep. 30, 2021
Equity [Abstract]  
Supplemental Information about Changes to Accumulated Other Comprehensive Income Note 3—Supplemental Information about Changes to Accumulated Other Comprehensive Income
Components of Accumulated Other Comprehensive Income: An analysis of the change in balance by component of Accumulated Other Comprehensive Income is as follows for the three and nine month periods ended September 30, 2021 and 2020:
 Three Months Ended September 30, 2021
 Available
for Sale
Assets		Deferred
Acquisition
Costs		Foreign
Exchange		Pension
Adjustments		Total
Balance at July 1, 2021
$2,883,391 $(4,098)$27,697 $(156,711)$2,750,279 
Other comprehensive income (loss) before reclassifications, net of tax(76,174)341 (5,402)— (81,235)
Reclassifications, net of tax(11,533)— — 4,108 (7,425)
Other comprehensive income (loss)(87,707)341 (5,402)4,108 (88,660)
Balance at September 30, 2021
$2,795,684 $(3,757)$22,295 $(152,603)$2,661,619 
 Three Months Ended September 30, 2020
 Available
for Sale
Assets		Deferred
Acquisition
Costs		Foreign
Exchange		Pension
Adjustments		Total
Balance at July 1, 2020
$2,370,832 $(5,312)$3,766 $(137,393)$2,231,893 
Other comprehensive income (loss) before reclassifications, net of tax301,423 304 4,364 — 306,091 
Reclassifications, net of tax9,352 — — 3,283 12,635 
Other comprehensive income (loss)310,775 304 4,364 3,283 318,726 
Balance at September 30, 2020
$2,681,607 $(5,008)$8,130 $(134,110)$2,550,619 
 Nine Months Ended September 30, 2021
 Available
for Sale
Assets		Deferred
Acquisition
Costs		Foreign
Exchange		Pension
Adjustments		Total
Balance at January 1, 2021
$3,175,572 $(4,704)$23,302 $(164,926)$3,029,244 
Other comprehensive income (loss) before reclassifications, net of tax(355,322)947 (1,007)— (355,382)
Reclassifications, net of tax(24,566)— — 12,323 (12,243)
Other comprehensive income (loss)(379,888)947 (1,007)12,323 (367,625)
Balance at September 30, 2021
$2,795,684 $(3,757)$22,295 $(152,603)$2,661,619 
 Nine Months Ended September 30, 2020
 Available
for Sale
Assets		Deferred
Acquisition
Costs		Foreign
Exchange		Pension
Adjustments		Total
Balance at January 1, 2020
$1,982,650 $(5,916)$12,058 $(143,962)$1,844,830 
Other comprehensive income (loss) before reclassifications, net of tax669,680 908 (3,928)— 666,660 
Reclassifications, net of tax29,277 — — 9,852 39,129 
Other comprehensive income (loss)698,957 908 (3,928)9,852 705,789 
Balance at September 30, 2020
$2,681,607 $(5,008)$8,130 $(134,110)$2,550,619 
Reclassification adjustments: Reclassification adjustments out of Accumulated Other Comprehensive Income are presented below for the three and nine month periods ended September 30, 2021 and 2020.
  Three Months Ended
September 30,		Nine Months Ended September 30,Affected line items in the Statement of Operations
Component Line Item2021202020212020
Unrealized investment (gains) losses on available for sale assets:
Realized (gains) losses$(16,269)$10,276 $(35,925)$32,133 Realized (gains) losses
Amortization of (discount) premium1,670 1,562 4,829 4,927 Net investment income
Total before tax(14,599)11,838 (31,096)37,060 
Tax3,066 (2,486)6,530 (7,783)Income taxes
Total after-tax(11,533)9,352 (24,566)29,277 
Pension adjustments:
Amortization of prior service cost158 158 474 474 Other operating expense
Amortization of actuarial (gain) loss5,040 3,998 15,124 11,997 Other operating expense
Total before tax5,198 4,156 15,598 12,471 
Tax(1,090)(873)(3,275)(2,619)Income taxes
Total after-tax4,108 3,283 12,323 9,852 
Total reclassification (after-tax)
$(7,425)$12,635 $(12,243)$39,129