Stockholders' Equity - Preferred Stock (Details) - $ / shares			3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2026	Sep. 30, 2025	Jun. 30, 2024	Sep. 30, 2025	Jun. 30, 2025	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)			7.50%	6.50%	3.00%		4.50%
Series H Preferred Stock [Member]
Stockholders' equity
Preferred stock, Cumulative Redeemable Preferred Stock, dividend rate (as a percent)	6.125%	6.125%				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%				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