Statutory Matters Statutory Matters (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 01, 2022	Jun. 30, 2022	Jun. 19, 2022	Mar. 23, 2022	Jan. 14, 2022
Statutory Accounting Practices [Line Items]
Capital stock and unassigned surplus	$ 726.0	$ 683.1
Paid in capital	363.2	363.2
Total statutory surplus	1,089.2	1,046.3
SAP, net income amount	94.9	140.4	$ 129.3
Total stockholders’ equity	1,213.1	$ 1,212.8
EICN
Statutory Accounting Practices [Line Items]
Capital stock and unassigned surplus	$ 247.6
Extraordinary dividends, approves or does not disapprove the payment within	30 days
Percentage of surplus of EICN's statutory surplus as regards to policyholders	10.00%
Dividends paid, without approval of regulatory agency	$ 12.5
EICN | Forecast [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval							$ 9.7
ECIC
Statutory Accounting Practices [Line Items]
Percentage of surplus of EICN's statutory surplus as regards to policyholders	10.00%
Percentage of Net Income	100.00%
Dividends paid, without approval of regulatory agency	$ 32.1
ECIC | Forecast [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval								$ 120.0
EPIC
Statutory Accounting Practices [Line Items]
Percentage of surplus used to calculate the lesser of 10% of surplus or net income, not including realized capital gains, plus a 2-year carry forward.	10.00%
Percentage of surplus used to calculate 10% of surplus, with dividends payable limited to unassigned funds minus 25% of unrealized capital gains	10.00%
Percentage of surplus used to calculate the lesser of 10% of surplus or net investment income plus a 3-year carry forward with dividends payable limited to unassigned funds minus 25% of unrealized capital gains	10.00%
Percentage of unassigned gains used to calculate 10% of surplus, with dividends payable limited to unassigned funds minus 25% of unrealized capital gains	25.00%
Percentage of unassigned gains used to calculate the lesser of 10% of surplus or net investment income plus a 3-year carry forward with dividends payable limited to unassigned funds minus 25% of unrealized capital gains	25.00%
Dividends paid, without approval of regulatory agency	$ 22.9
EPIC | Forecast [Member]
Statutory Accounting Practices [Line Items]
Maximum dividends that may be paid without prior approval						$ 24.0
EAC
Statutory Accounting Practices [Line Items]
Dividends paid, without approval of regulatory agency	21.1
EAC | Forecast [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval					$ 23.2
EAC and EPIC
Statutory Accounting Practices [Line Items]
Total statutory surplus	$ 4.0
Florida statute section 624.408 requires EPIC and EAC to maintain minimum capital and surplus of the greater of $4.0 million or 10% of total liabilities.	10.00%
Used to calculate ratio of written premium to surplus	1.25
Net gross premiums to surplus ratio. Florida statute section 624.4095 requires net gross premiums times 1.25 not exceed this ratio.	10-to-1
Net written premiums to surplus ratio. Florida statute section 624.4095 requires net written premiums times 1.25 not exceed this ratio.	4-to-1
CIC
Statutory Accounting Practices [Line Items]
Percentage of surplus of EICN's statutory surplus as regards to policyholders	10.00%
Dividends paid, without approval of regulatory agency	$ 3.0
net investment income, Percentage Of	100.00%
CIC | Forecast [Member]
Statutory Accounting Practices [Line Items]
Maximum dividends that may be paid without prior approval				$ 2.7