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Borrowings - Convertible Notes, Narrative (Details) |  |  | 3 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) $ / shares | Nov. 02, 2022 USD ($) $ / shares | Mar. 31, 2024 USD ($) $ / shares | Aug. 15, 2023 USD ($) | Mar. 14, 2023 USD ($) | Dec. 09, 2022 USD ($) | Dec. 06, 2022 USD ($) | Nov. 04, 2022 USD ($) | Jun. 07, 2019 USD ($) | Aug. 31, 2018 USD ($) | Aug. 30, 2018 USD ($) | Aug. 20, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Face amount | $ 300,000,000 |  | $ 300,000,000 |  |  |  |  |  |  |  |  |
2022 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Increases in dividend in excess (in dollars per share) | $ / shares | $ 0.30 |  | $ 0.30 |  |  |  |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares | $ 13.79 | $ 14.20 | 13.79 |  |  |  |  |  |  |  |  |
Conversion rate | 72.5249 | 70.4225 |  |  |  |  |  |  |  |  |  |
Minimum | 2022 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares | $ 12.38 |  | $ 12.38 |  |  |  |  |  |  |  |  |
Maximum | 2022 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate |  |  | 80.7754 |  |  |  |  |  |  |  |  |
Convertible Notes | 2018 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  | $ 86,250,000 | $ 115,000,000 | $ 15,000,000 | $ 100,000,000
Stated interest rate | 5.75% |  | 5.75% |  |  |  |  |  |  |  |  |
Maximum purchase amount |  |  |  |  |  |  |  | $ 201,250,000 |  |  |  |
Purchase amount per $1,000 principal amount |  |  |  |  |  |  |  | $ 1 |  |  |  |
Purchase amount |  |  |  |  |  |  | $ 84,434,000 |  |  |  |  |
Outstanding balance |  |  |  | $ 116,816,000 |  | $ 116,816,000 |  |  |  |  |  |
Convertible Notes | 2022 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  | $ 200,000,000 |  |  | $ 60,000,000 |  |  |  |  |  |  |
Stated interest rate | 7.50% |  | 7.50% |  |  |  |  |  |  |  |  |
Outstanding balance | $ 260,000,000 |  | $ 260,000,000 |  |  |  |  |  |  |  |  |
Redemption as a percentage of principal |  |  | 100.00% |  |  |  |  |  |  |  |  |

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