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Organization and Basis of Presentation - Summary of Financial Securities (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Equity securities: |  |  |
Gross Unrealized (Loss) Gain | $ (46,441) | $ 16,681 |
Carrying Value | 200 |  | $ 800
Available for sale |  |  |
Equity and Debt Securities, Amortized Cost | 151,227 |  | 142,398
Equity and Debt Securities, Gross Unrealized Gain (Loss) | 3,286 |  | 49,431
Equity and Debt Securities, Marketable Securities | 154,513 |  | 191,829
Investment funds - debt securities |  |  |
Equity securities: |  |  |
Cost | 63,409 |  | 62,192
Gross Unrealized (Loss) Gain | (8,747) |  | (502)
Carrying Value | 54,662 |  | 61,690
Common stock and stock funds |  |  |
Equity securities: |  |  |
Cost | 86,767 |  | 79,155
Gross Unrealized (Loss) Gain | 11,396 |  | 49,592
Carrying Value | 98,163 |  | 128,747
Investment-grade unsecured debt |  |  |
Available for sale |  |  |
Cost | 1,051 |  | 1,051
Gross Unrealized (Loss) Gain | 637 |  | 341
Carrying Value | $ 1,688 |  | $ 1,392

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