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Members' Equity - Stock Issuance (FY) (Details) - USD ($) $ in Millions | 5 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019
Class A-1 Units |  |  |
Members' equity |  |  |
Common units, shares authorized (in shares) | 821,769 | 821,769 | 821,769
Common units, shares issued (in shares) | 821,769 | 821,769 | 821,769
Common units, shares outstanding (in shares) | 821,769 | 821,769 | 821,769
Class A-2 Units |  |  |
Members' equity |  |  |
Common units, shares authorized (in shares) | 34,264 | 34,264 | 34,264
Common units, shares issued (in shares) | 24,058 | 24,058 | 24,058
Common units, shares outstanding (in shares) | 24,058 | 24,058 | 24,058
Common stock, units sold (in shares) | 24,058 |  |
Proceeds from issuance of stock | $ 17.6 |  |
Class A-3 and Class B Units |  |  |
Members' equity |  |  |
Common units, shares authorized (in shares) | 274,667 | 274,822 | 274,667
Class A-3 Units |  |  |
Members' equity |  |  |
Common units, shares issued (in shares) | 53,333 | 53,333 | 53,333
Common units, shares outstanding (in shares) | 53,333 | 53,333 | 53,333
Class B Units |  |  |
Members' equity |  |  |
Common units, shares issued (in shares) | 192,038 | 221,483 | 210,744
Common units, shares outstanding (in shares) | 192,038 | 221,483 | 210,744

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