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Debt - Narrative (Details) € in Millions |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 29, 2022 USD ($) | Sep. 08, 2021 USD ($) | Sep. 30, 2021 USD ($) | Aug. 31, 2021 | Jul. 31, 2021 | Mar. 31, 2007 USD ($) | Sep. 30, 2022 USD ($) credit_facility | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) credit_facility | Sep. 30, 2021 USD ($) | Sep. 30, 2022 EUR (€) credit_facility | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Aug. 11, 2021 USD ($) | Jul. 13, 2021 USD ($) | Jul. 13, 2021 EUR (€) | Jun. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  | $ 615,500,000 |  | $ 615,500,000 |  |  |  | $ 420,900,000 |  |  |  |  |
Debt covenant, maximum loan to value percent, period one |  |  |  |  |  |  | 50.00% |  | 50.00% |  | 50.00% |  |  |  |  |  |  |
Debt covenant, maximum loan to value percent, period two |  |  |  |  |  |  | 40.00% |  | 40.00% |  | 40.00% |  |  |  |  |  |  |
Debt covenant, maximum loan to value percent, period three |  |  |  |  |  |  | 25.00% |  | 25.00% |  | 25.00% |  |  |  |  |  |  |
Debt covenant, maximum loan to value percent, period four |  |  |  |  |  |  | 15.00% |  | 15.00% |  | 15.00% |  |  |  |  |  |  |
Debt covenant, maximum loan to value percent, period five |  |  |  |  |  |  | 0.00% |  | 0.00% |  | 0.00% |  |  |  |  |  |  |
Debt covenant, maximum loan to value percent |  |  |  |  |  |  | 35.00% |  | 35.00% |  | 35.00% |  |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured credit facilities | credit_facility |  |  |  |  |  |  | 5 |  | 5 |  | 5 |  |  |  |  |  |  |
Ark |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  | $ 180,000,000.0 |  | $ 180,000,000.0 |  |  |  | 185,900,000 |  |  |  |  |
Unsecured Subordinated Debt | Group Ark Insurance Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | $ 157,800,000 |  |  |  |  |  |  |  |  |  |
Unsecured Subordinated Debt | Group Ark Insurance Limited | Ark |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes issued |  |  | $ 163,300,000 |  |  |  |  | 163,300,000 |  | $ 163,300,000 |  |  |  |  |  |  |  |
HG Global Senior Notes | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | $ 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual payments |  |  |  |  |  |  | 15,000,000 |  | 15,000,000 |  |  |  |  |  |  |  |  |
Interest reserve account |  |  |  |  |  |  | 26,400,000 |  | $ 26,400,000 |  |  |  |  |  |  |  |  |
Additional interest rate |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  | 150,000,000.0 |  | $ 150,000,000.0 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  | 146,400,000 |  | 146,400,000 |  |  |  |  |  |  |  |  |
HG Global Senior Notes | Secured Debt | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 6.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ark 2007 Subordinated Notes, carrying value | Ark Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  | 30,000,000.0 |  | 30,000,000.0 |  |  |  | 30,000,000.0 |  |  |  |  |
Ark 2007 Subordinated Notes, carrying value | Junior Notes | Ark |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face value |  |  |  |  |  | $ 30,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  | 30,000,000 |  | 30,000,000 |  |  |  |  |  |  |  |  |
Ark 2007 Subordinated Notes, carrying value | Junior Notes | USD-LIBOR | Ark |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 4.60% |  |  |  |  |  |  |  |  |  |  |  |
Ark 2021 Notes Tranche 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance | € |  |  |  |  |  |  |  |  |  |  | € 39.1 |  |  |  |  |  |  |
Ark 2021 Notes Tranche 1 | Ark Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  | 37,600,000 |  | 37,600,000 |  |  |  | 44,200,000 |  |  |  |  |
Ark 2021 Notes Tranche 1 | Unsecured Subordinated Debt | Group Ark Insurance Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 46,300,000 | € 39.1 |  |
Ark 2021 Notes Tranche 1 | Unsecured Subordinated Debt | Group Ark Insurance Limited | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  | 5.75% |  |  |  |  |  |  |  |  |  |  |  |  |
Ark 2021 Notes Tranche 2 | Ark Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  | 47,000,000.0 |  | 47,000,000.0 |  |  |  | 47,000,000.0 |  |  |  |  |
Ark 2021 Notes Tranche 2 | Unsecured Subordinated Debt | Group Ark Insurance Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes issued |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 47,000,000 |  |  |  |
Ark 2021 Notes Tranche 2 | Unsecured Subordinated Debt | Group Ark Insurance Limited | USD-LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 5.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ark 2021 Notes Tranche 3 | Ark Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  | 70,000,000.0 |  | 70,000,000.0 |  |  |  | 70,000,000.0 |  |  |  |  |
Ark 2021 Notes Tranche 3 | Unsecured Subordinated Debt | Group Ark Insurance Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional interest rate |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes issued |  | $ 70,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Solvency capital requirement |  |  | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt to capital requirement |  |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ark 2021 Notes Tranche 3 | Unsecured Subordinated Debt | Group Ark Insurance Limited | USD-LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 6.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ING LOC Facility | Secured Debt | Ark | Letter of Credit | Uncollateralized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total commitment under revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |  |
Citibank LOC Facility | Short-term investments | Asset Pledged as Collateral |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments pledged as collateral |  |  |  |  |  |  | 49,800,000 |  | 49,800,000 |  |  |  | 50,000,000 |  |  |  |  |
Citibank LOC Facility | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit |  |  |  |  |  |  | 36,200,000 |  | 36,200,000 |  |  |  |  |  |  |  |  |
Citibank LOC Facility | Secured Debt | Ark | Letter of Credit | Collateral Pledged |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total commitment under revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |
Lloyds LOC Facility | Secured Debt | Ark | Letter of Credit | Collateral Pledged |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total commitment under revolving credit facility |  |  |  |  |  |  | 50,000,000 |  | 50,000,000 |  |  |  |  |  |  |  |  |
Kudu Bank Facility | Kudu |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total commitment under revolving credit facility |  |  |  |  |  |  | 300,000,000 |  | 300,000,000 |  |  |  |  |  |  |  |  |
Kudu Bank Facility | Revolving Credit Facility | Kudu |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on debt extinguishment |  |  |  |  |  |  |  |  | 4,100,000 |  |  |  |  |  |  |  |  |
Kudu Bank Facility | Line of Credit | Kudu |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest reserve |  |  |  |  |  |  | 8,900,000 |  | 8,900,000 |  |  |  |  |  |  |  |  |
Kudu Bank Facility | Term Loan | Kudu |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | 0 | 0 | 0 | 3,000,000.0 |  |  |  |  |  |  |  |
Debt |  |  | $ 0 |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 |  | $ 0 | 0 |  |  |  | $ 0 | $ 89,200,000
Percentage of borrowing base |  |  |  |  |  |  | 35.00% |  | 35.00% |  | 35.00% |  |  |  |  |  |  |
Remaining borrowing capacity under revolving credit facility |  |  |  |  |  |  | $ 39,600,000 |  | $ 39,600,000 |  |  |  |  |  |  |  |  |
Other Operations | Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  | $ 36,400,000 |  | $ 36,400,000 |  |  |  | $ 17,100,000 |  |  |  |  |

X
- Definition Amount of the total principal payments made during the annual reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126972273&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126972273&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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