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Redeemable Non-Controlling Interest - Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 01, 2021 | Apr. 01, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2021 | Mar. 05, 2019
Noncontrolling Interest [Line Items] |  |  |  |  |  |
Repurchase of non-controlling interest |  | $ 11,200 | $ 11,191 | $ 0 |  |
Proceeds from noncontrolling interests | $ 12,500 |  | $ 12,457 | $ 0 |  |
Discovery Benefits |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |
Ownership percentage by noncontrolling interest |  |  |  |  |  | 4.90%
Discovery Benefits | Maximum |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |
Call rights, exercise period |  |  |  |  | 7 years |
Healthcare Bank |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |
Ownership percentage by noncontrolling interest | 4.53% | 4.53% |  |  |  |

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