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Leases - Schedule of Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Lessee, Lease, Description [Line Items] |  |
ROU lease assets | $ 24.5 | $ 28.1
Lease liabilities | $ 26.5 | $ 30.0
Operating lease, weighted average incremental borrowing rate, percent | 4.10% | 4.00%
HG/BAM |  |
Lessee, Lease, Description [Line Items] |  |
ROU lease assets | $ 6.2 | $ 7.6
Lease liabilities | 6.7 | 8.1
Ark |  |
Lessee, Lease, Description [Line Items] |  |
ROU lease assets | 6.6 | 7.0
Lease liabilities | 6.6 | 7.0
Asset Management (Kudu) |  |
Lessee, Lease, Description [Line Items] |  |
ROU lease assets | 5.9 | 6.4
Lease liabilities | 6.8 | 7.1
Other Operations |  |
Lessee, Lease, Description [Line Items] |  |
ROU lease assets | 5.8 | 7.1
Lease liabilities | $ 6.4 | $ 7.8

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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 Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Weighted average discount rate for operating lease calculated at point in time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(4) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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