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Temporary Equity, Equity and Dividends (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 01, 2023 | Jan. 03, 2023 | Nov. 06, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred and participating dividends |  |  |  | $ 8.7 |  |  | $ 8.7 |  |  | $ 25.9 | $ 25.6
Redeemable non-controlling interest, Redemption period |  |  |  | 60 days |  |  |  |  |  |  |
Adjustment of redeemable non-controlling interest |  |  |  | $ 5.0 |  |  | $ 0.0 |  |  | 5.0 | 0.0
Dividends declared (usd per share) |  |  |  | $ 0.31 | $ 0.29 | $ 0.29 | $ 0.29 | $ 0.27 | $ 0.27 |  |
VeriTread |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Non-controlling interest, percentage |  | 4.00% |  |  |  |  |  |  |  |  |
Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Initial conversion price (usd per share) | $ 73.00 |  |  |  |  |  |  |  |  |  |
Anti-dilution adjustment provisions (usd per share) | $ 71.58 |  |  |  |  |  |  |  |  |  |
Senior A Senior Preferred Shares |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred and participating dividends |  |  |  | $ 2.1 |  |  | $ 2.0 |  |  | 5.9 | 5.5
Senior A Senior Preferred Shares | Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Initial preferred dividend, percentage | 5.50% |  |  |  |  |  |  |  |  |  |
Participating dividends (usd per share) | $ 0.27 |  |  |  |  |  |  |  |  |  |
Senior A Senior Preferred Shares | Securities Purchase Agreement | Starboard Value LP and certain of its affiliates |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Increase in preferred dividend rate in fourth anniversary, percentage | 7.50% |  |  |  |  |  |  |  |  |  |
Spread on variable rate, percentage | 6.00% |  |  |  |  |  |  |  |  |  |
Increase in preferred dividend rate in ninth anniversary, percentage | 10.50% |  |  |  |  |  |  |  |  |  |
Preferred Dividends on Series A Senior Preferred Shares |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred and participating dividends |  |  |  | $ 6.7 |  |  | $ 6.7 |  |  | $ 20.1 | $ 20.1
Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends declared (usd per share) |  |  | $ 0.31 |  |  |  |  |  |  |  |
VeriTread |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Remaining units ownership interest, percentage |  | 21.00% |  |  |  |  |  |  |  |  |

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