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FEDERAL INCOME TAX
12 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
FEDERAL INCOME TAX FEDERAL INCOME TAX
The Tax Act was enacted on December 22, 2017. The Tax Act significantly revised the U.S. corporate income tax laws including lowering the U.S. federal corporate tax rate from 35 percent to 21 percent, effective January 1, 2018.

In December 2017, the SEC staff issued Staff Accounting Bulletin No. 118, which addresses how a company recognizes provisional amounts when a company does not have the necessary information available, prepared or analyzed in reasonable detail to complete its accounting for the effect of the changes in the Tax Act. The measurement period ends when a company has obtained, prepared and analyzed the information necessary to finalize its accounting, but cannot extend beyond one year. As of December 31, 2018 we have completed accounting for the tax effects of enactment of the Tax Act and no adjustments were made during the measurement period.
On March 27, 2020, the CARES Act was enacted in response to the COVID-19 pandemic. The CARES Act, among other things, permits NOL carryovers and carrybacks to offset 100 percent of taxable income for taxable years beginning before 2021. In addition, the CARES Act allows NOLs incurred in 2018, 2019, and 2020 to be carried back to each of the five preceding taxable years to generate a refund of previously paid income taxes. The Company has considered the implications of the CARES Act on its tax provision and has included an income tax benefit of $18.6 million as the result of this Act.
Federal income tax expense (benefit) from both continuing and discontinued operations is composed of the following:
   
Years Ended December 31,202020192018
Current$(46,861)$(7,843)$18,493 
Deferred(9,948)9,902 (21,791)
Total$(56,809)$2,059 $(3,298)

A reconciliation of income tax expense (benefit) computed at the applicable federal tax rate of 21.0 percent in 2020, 2019 and 2018 to the amount recorded in the accompanying Consolidated Statements of Income and Comprehensive Income is as follows:
   
Years Ended December 31,202020192018
Computed expected income tax expense (benefit)$(35,598)$3,544 $5,114 
The CARES Act(18,562)— — 
Tax-exempt municipal bond interest income(3,669)(3,961)(4,235)
Nontaxable dividend income(517)(594)(591)
Goodwill impairment3,169 — — 
Valuation allowance reduction — (329)
Compensation695 1,638 (497)
Reinsurance 998 — 
Research and development credit(2,045)— — 
Other, net(282)434 (2,760)
Consolidated federal income tax expense (benefit)$(56,809)$2,059 $(3,298)
Reconciliation of consolidated federal income tax expense (benefit) from:
Continuing operations$(56,809)$2,059 $(11,405)
Gain on sale of discontinued operations — 7,544 
Discontinued operations — 563 
Consolidated federal income tax expense (benefit)$(56,809)$2,059 $(3,298)
We measure certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is 21.0 percent. The significant components of our net deferred tax liability at December 31, 2020 and 2019 are as follows:
  
December 31,20202019
Deferred tax liabilities
Net unrealized appreciation on investment securities:
  Equity securities$33,096 $48,652 
  All other securities22,082 12,568 
Deferred policy acquisition costs18,289 19,801 
Investments in partnerships964 2,156 
Prepaid pension cost4,553 4,441 
Net bond discount accretion383 357 
Depreciation4,187 1,908 
Revaluation of investment basis (1)
325 377 
Identifiable intangible assets (1)
1,391 1,540 
Capitalized Software 4,891 — 
Other1,568 1,416 
Gross deferred tax liability91,729 $93,216 
Deferred tax assets
Financial statement reserves in excess of income tax reserves$23,851 $20,845 
Unearned premium adjustment18,979 20,816 
Net operating loss carryforwards 1,708 
Underfunded benefit plan obligation4,295 9,072 
Post-retirement benefits other than pensions9,533 10,785 
Other-than-temporary impairment of investments1,974 2,094 
Compensation expense related to stock options2,307 2,394 
Nonqualified deferred compensation2,066 1,623 
Other3,795 3,293 
Deferred tax asset$66,800 $72,630 
Net deferred tax liability$24,929 $20,586 
(1) Related to our acquisition of Mercer Insurance Group, Inc.