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Fair Value of Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2022
Fair Value Disclosures [Abstract] |
Summary of the fair value and carrying value of financial instruments | The following tables presents the fair value and carrying value of these financial instruments as of March 31, 2022 and December 31, 2021:
|  | March 31, 2022 |  | December 31, 2021
Millions |  | Fair Value |  | Carrying Value |  | Fair Value |  | Carrying Value
Ark 2007 Subordinated Notes |  | $ | 27.8 |  |  | $ | 30.0 |  |  | $ | 27.6 |  |  | $ | 30.0 |
Ark 2021 Subordinated Notes |  | $ | 163.4 |  |  | $ | 154.8 |  |  | $ | 162.8 |  |  | $ | 155.9 |
NSM Bank Facility |  | $ | 273.1 |  |  | $ | 270.0 |  |  | $ | 275.8 |  |  | $ | 271.2 |
Other NSM debt |  | $ | .7 |  |  | $ | .6 |  |  | $ | 1.0 |  |  | $ | .9 |
Kudu Credit Facility |  | $ | 241.8 |  |  | $ | 218.2 |  |  | $ | 246.8 |  |  | $ | 218.2 |
Other Operations debt |  | $ | 17.7 |  |  | $ | 17.3 |  |  | $ | 17.7 |  |  | $ | 16.8 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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