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Segments
12 Months Ended
Dec. 31, 2023
Segment Reporting [Abstract]  
Segment Reporting Disclosure [Text Block] Segment Reporting
The Company operates as a single reportable segment, Insurance Operations, through our wholly owned subsidiaries. In the fourth quarter of 2023, the Company developed and executed an integration plan to consolidate our previously segregated direct-to-consumer operations (Cerity) into the Company's mainstream operations, while retaining our digital distribution capabilities. The integration plan, which will allow the Company to operate more efficiently and generate cost savings, resulted in a change in the composition of our reportable segments by eliminating any distinction, including stand-alone financial statements, among our former segments, which were: Employers and Cerity.
The Insurance Operations segment represents the traditional business offered through its agents, including business originated from the Company's strategic partnerships and alliances and also direct-to-customer business.
The following table summarizes the Company's written premiums and components of net income. All periods prior to December 31, 2023 have been conformed to the current presentation.
Insurance Operations
Total
(in millions)
Year Ended December 31, 2023
Gross premiums written$767.7 $767.7 
Net premiums written760.6 760.6 
Net premiums earned721.9 721.9 
Net investment income106.5 106.5 
Net realized and unrealized gains on investments
22.7 22.7 
Other (loss) income
(0.2)(0.2)
Total revenues850.9 850.9 
Losses and loss adjustment expenses405.7 405.7 
Commission expense100.0 100.0 
Underwriting and general and administrative expenses180.0 180.0 
Interest and financing expenses5.8 5.8 
Other expenses11.0 11.0 
Total expenses702.5 702.5 
Net income before income taxes
148.4 148.4 
Income tax expense
30.3 30.3 
Net income
$118.1 $118.1 
Insurance Operations
Total
(in millions)
Year Ended December 31, 2022
Gross premiums written$714.2 $714.2 
Net premiums written707.2 707.2 
Net premiums earned675.2 675.2 
Net investment income89.8 89.8 
Net realized and unrealized (losses) on investments
(51.8)(51.8)
Other income0.3 0.3 
Total revenues713.5 713.5 
Losses and loss adjustment expenses391.0 391.0 
Commission expense95.9 95.9 
Underwriting and general and administrative expenses167.3 167.3 
Interest and financing expenses3.5 3.5 
Total expenses657.7 657.7 
Net income before income taxes
55.8 55.8 
Income tax expense
7.4 7.4 
Net income$48.4 $48.4 
Insurance Operations
Total
(in millions)
Year Ended December 31, 2021
Gross premiums written$589.7 $589.7 
Net premiums written583.1 583.1 
Net premiums earned574.4 574.4 
Net investment income72.7 72.7 
Net realized and unrealized gains on investments
54.6 54.6 
Other income1.4 1.4 
Total revenues703.1 703.1 
Losses and loss adjustment expenses315.2 315.2 
Commission expense76.1 76.1 
Other underwriting expenses
160.2 160.2 
Interest and financing expenses0.5 0.5 
Other expenses4.1 4.1 
Total expenses556.1 556.1 
Net income before income taxes
147.0 147.0 
Income tax expense
27.7 27.7 
Net income
$119.3 $119.3 
Entity-Wide Disclosures
The Company operates solely within the United States and does not have revenue from transactions with a single policyholder accounting for 10% or more of its revenues. The following table shows our in-force premiums, in-force premiums including
estimated final audit premium, and number of policies in-force for each state of our largest states and all other states combined as of December 31:
202320222021
StateIn-force PremiumsPolicies
In-force
In-force PremiumsPolicies
In-force
In-force PremiumsPolicies
In-force
(dollars in millions)
California$311.5 43,353 $279.7 42,876 $258.4 40,704 
Florida56.6 10,008 49.4 9,417 41.1 7,989 
New York31.9 7,603 27.3 7,497 24.5 7,307 
Other (43 states and D.C.)294.6 65,445 266.1 61,566 247.4 55,350 
Total$694.6 126,409 $622.5 121,356 $571.4 111,350 
Estimated audit premium45.6 — 39.5 — 42.3 — 
Total, including estimated audit premium$740.2 126,409 $662.0 121,356 $613.7 111,350