Shareholders' Equity (Narrative) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Nov. 13, 2025 |
|
| Equity [Abstract] | ||||||||||
| Common shares, authorized (in shares) | 300,000,000 | 300,000,000 | 300,000,000 | |||||||
| Preferred shares, par value (in usd per share) | $ 0.01 | $ 0.01 | $ 0.01 | |||||||
| Treasury Stock, Shares, Acquired | 700,000 | |||||||||
| Treasury Stock, Value, Acquired, Cost Method | $ 15,100,000 | $ 24,600,000 | $ 35,200,000 | $ 30,100,000 | $ 15,100,000 | |||||
| Common Stock, Dividends, Per Share, Declared | $ 0.15 | $ 0.15 | $ 0.15 | $ 0.15 | $ 0.15 | |||||
| Preferred shares, authorized (in shares) | 10,000,000 | 10,000,000 | 10,000,000 | |||||||
| Dividends, Common Stock, Cash | $ 7,400,000 | $ 7,600,000 | $ 7,000,000.0 | $ 7,000,000 | $ 7,600,000 | $ 7,100,000 | $ 22,000,000.0 | |||
| Payments of Dividends | 21,500,000 | $ 22,400,000 | ||||||||
| Share Repurchase Program, Authorized, Amount | $ 100,000,000.0 | |||||||||
| Share Repurchase Program, Authorized, Number of Shares | 10,000,000.0 | |||||||||
| Share Repurchase Program, Remaining Authorized, Amount | $ 84.9 | $ 84.9 | ||||||||