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Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2019
Other Comprehensive Income (Loss), Tax [Abstract]  
Change In Accumulated Other Comprehensive Income By Component, Net Of Taxes And Noncontrolling Interests
The following table presents the change in accumulated other comprehensive income (loss) by component, net of taxes and noncontrolling interests.

(dollars in thousands)
Unrealized
Holding Gains
on Available-for-
Sale Securities
 
Foreign
Currency
 
Net Actuarial
Pension Loss
 
Total
December 31, 2016
$
1,714,930

 
$
(84,406
)
 
$
(64,658
)
 
$
1,565,866

Other comprehensive income before reclassifications
787,339

 
10,403

 
3,092

 
800,834

Amounts reclassified from accumulated other comprehensive income
(24,296
)
 
—

 
3,167

 
(21,129
)
Total other comprehensive income
763,043

 
10,403

 
6,259

 
779,705

December 31, 2017
$
2,477,973

 
$
(74,003
)
 
$
(58,399
)
 
$
2,345,571

Cumulative effect of adoption of ASU No. 2016-01
(2,597,976
)
 
2,492

 
—

 
(2,595,484
)
Cumulative effect of adoption of ASU No. 2018-02
401,539

 
1,314

 
—

 
402,853

January 1, 2018
281,536

 
(70,197
)
 
(58,399
)
 
152,940

Other comprehensive loss before reclassifications
(241,325
)
 
(16,455
)
 
—

 
(257,780
)
Amounts reclassified from accumulated other comprehensive income
7,849

 
—

 
2,341

 
10,190

Total other comprehensive income (loss)
(233,476
)
 
(16,455
)
 
2,341

 
(247,590
)
December 31, 2018
$
48,060

 
$
(86,652
)
 
$
(56,058
)
 
$
(94,650
)
Other comprehensive income before reclassifications
299,125

 
403

 
2,908

 
302,436

Amounts reclassified from accumulated other comprehensive loss
(1,148
)
 
—

 
2,134

 
986

Total other comprehensive income
297,977

 
403

 
5,042

 
303,422

December 31, 2019
$
346,037

 
$
(86,249
)
 
$
(51,016
)
 
$
208,772
Summary Of Tax Expense (Benefit) Of Other Comprehensive Income (Loss)
The following table summarizes the tax expense (benefit) associated with each component of other comprehensive income.

 
Years Ended December 31,
(dollars in thousands)
2019
 
2018
 
2017
Change in net unrealized gains on available-for-sale investments:
 
 
 
 
 
Net holding gains (losses) arising during the period
$
84,219

 
$
(68,056
)
 
$
372,469

Reclassification adjustments for net gains (losses) included in net income (loss)
(305
)
 
2,086

 
(10,072
)
Change in net unrealized gains on available-for-sale investments
83,914

 
(65,970
)
 
362,397

Change in foreign currency translation adjustments
—

 
1,523

 
28

Change in net actuarial pension loss
1,348

 
622

 
1,284

Total
$
85,262

 
$
(63,825
)
 
$
363,709
Reclassifications From Accumulated Other Comprehensive Income Into Income, By Component
The following table presents the details of amounts reclassified from accumulated other comprehensive income (loss) into income (loss), by component.

 
Years Ended December 31,
(dollars in thousands)
2019
 
2018
 
2017
Unrealized holding gains on available-for-sale securities:
 
 
 
 
 
Other-than-temporary impairment losses
$
—

 
$
—

 
$
(7,589
)
Net realized investment gains (losses), excluding other-than-temporary impairment losses
1,453

 
(9,935
)
 
41,957

Total before income taxes
1,453

 
(9,935
)
 
34,368

Income taxes
(305
)
 
2,086

 
(10,072
)
Reclassification of unrealized holding gains (losses), net of taxes
$
1,148

 
$
(7,849
)
 
$
24,296

 
 
 
 
 
 
Net actuarial pension loss:
 
 
 
 
 
Underwriting, acquisition and insurance expenses
$
(6,390
)
 
$
(2,963
)
 
$
(3,815
)
Income taxes
1,348

 
622

 
648

Reclassification of net actuarial pension loss, net of taxes
$
(5,042
)
 
$
(2,341
)
 
$
(3,167
)