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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2025
Income Tax Disclosure [Abstract]  
Schedule of Provision for Income Taxes
The provision for income taxes consists of the following for the years ended December 31:
(in thousands)
202520242023
Federal
Current income tax expense$131,645 $152,926 $116,874 
Deferred income tax expense (benefit)19,547 4,026 (1,002)
State
Current income tax expense76 13 3 
Deferred income tax expense— — — 
Income tax expense$151,268 $156,965 $115,875 
Schedule of Reconciliation of the Provision for Income Taxes
A reconciliation of the provision for income taxes, with amounts determined by applying the statutory federal income tax rate to pre-tax income, is as follows for the years ended December 31:
(dollars in thousands)
202520242023
Amount%Amount%Amount%
U.S. federal tax at statutory rate$149,227 21.0 %$159,029 21.0 %$118,007 21.0 %
State and local income taxes, net of federal income tax effect (1)
60 0.0 10 0.0 2 0.0 
Tax credits(1,432)(0.2)(2,000)(0.3)(1,300)(0.2)
Nontaxable or nondeductible items2,703 0.4 569 0.1 651 0.1 
Other adjustments710 0.1 (643)(0.1)(1,485)(0.3)
Income tax provision$151,268 21.3 %$156,965 20.7 %$115,875 20.6 %
(1)    State taxes in Pennsylvania made up the majority (greater than 50 percent) of the tax effect in this category.
Schedule of Deferred Tax Assets and Liabilities
Temporary differences and carry-forwards, which give rise to deferred tax assets and liabilities, are as follows as of December 31:
(in thousands)
20252024
Deferred tax assets:
Other employee benefits$18,213 $18,409 
Allowance for management fee returned on cancelled policies7,322 4,647 
Charitable contributions5,221 — 
Deferred revenue4,457 4,181 
Current expected credit loss allowance 3,647 2,966 
Unrealized losses on investments— 3,827 
Other 4,958 4,617 
   Total deferred tax assets43,818 38,647 
Deferred tax liabilities:
Depreciation47,017 27,089 
Pension and other postretirement benefits13,919 12,276 
Unrealized gains on investments2,532 — 
Prepaid expenses1,506 2,013 
Other3,632 3,687 
   Total deferred tax liabilities68,606 45,065 
   Net deferred tax liability$(24,788)$(6,418)