v3.25.1
Stockholders' Equity - Preferred Stock (Details) - $ / shares
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2024
Series G Preferred Stock [Member]              
Stockholders' equity              
Preferred stock, Cumulative Redeemable Preferred Stock, shares outstanding (in shares) 2,650,000 2,650,000   2,650,000 2,650,000   2,650,000
Liquidation preference (in dollars per share) $ 25 $ 25   $ 25 $ 25   $ 25
Series G Preferred Stock [Member] | Montage Healdsburg              
Stockholders' equity              
Preferred Stock, Redemption Price Per Share $ 25 $ 25   $ 25 $ 25   25
Series G Preferred Stock [Member] | Maximum [Member] | Montage Healdsburg              
Stockholders' equity              
Preferred stock, Cumulative Redeemable Preferred Stock, dividend rate (as a percent)     6.50% 4.50% 4.50% 3.00%  
Series H Preferred Stock [Member]              
Stockholders' equity              
Preferred stock, Cumulative Redeemable Preferred Stock, dividend rate (as a percent) 6.125% 6.125%          
Preferred Stock, Redemption Price Per Share $ 25 $ 25   $ 25 $ 25   $ 25
Preferred stock, Cumulative Redeemable Preferred Stock, shares outstanding (in shares) 4,600,000 4,600,000   4,600,000 4,600,000   4,600,000
Liquidation preference (in dollars per share) $ 25 $ 25   $ 25 $ 25   $ 25
Preferred Stock, Redemption Date       May 24, 2026     May 24, 2026
Series I Cumulative Redeemable Preferred Stock              
Stockholders' equity              
Preferred stock, Cumulative Redeemable Preferred Stock, dividend rate (as a percent) 5.70% 5.70%          
Preferred Stock, Redemption Price Per Share $ 25 $ 25   $ 25 $ 25   $ 25
Preferred stock, Cumulative Redeemable Preferred Stock, shares outstanding (in shares) 4,000,000 4,000,000   4,000,000 4,000,000   4,000,000
Liquidation preference (in dollars per share) $ 25 $ 25   $ 25 $ 25   $ 25
Preferred Stock, Redemption Date       Jul. 16, 2026     Jul. 16, 2026