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Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Stockholders' Equity (Details) $ / shares in Units, $ in Thousands		3 Months Ended			9 Months Ended		12 Months Ended		42 Months Ended
	Apr. 30, 2026 USD ($)	Sep. 30, 2026 USD ($) $ / shares shares	Mar. 31, 2026 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2026 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Dec. 31, 2025 USD ($)	Dec. 31, 2021 USD ($) FinancialInstitution	Dec. 31, 2024 USD ($)	Apr. 28, 2026 USD ($)	Feb. 17, 2026 USD ($)
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of participating financial institutions \| FinancialInstitution								6
Payment of issuance of common stock costs					$ 0	$ (315)
Dividends owed		$ 57,270		$ 57,600	57,270	57,600
Shares acquired, average cost per share (in dollars per share) \| $ / shares			$ 23.36
Share Repurchase Program, Authorized, Amount										$ 500,000	$ 250,000
Treasury Stock, Shares, Acquired \| shares			3,900,000
Treasury Stock, Value, Acquired, Cost Method			$ 90,000
Share Repurchase Program, Remaining Authorized, Amount		410,000			410,000
Acquisition of partners' noncontrolling interest		18			18,549
Acquisition of partners' noncontrolling interests					18,549	$ 0
Consolidated Partnerships
Subsidiary, Sale of Stock [Line Items]
Subsidiary, Ownership Percentage, Noncontrolling Owner	10.00%
Consolidated Partnerships Owned 100 Mill Office Property [Member]
Subsidiary, Sale of Stock [Line Items]
Acquisition of partners' noncontrolling interests	$ 18,500
Additional Paid-in Capital [Member]
Subsidiary, Sale of Stock [Line Items]
Acquisition of partners' noncontrolling interest	4,500	360			4,474
Noncontrolling Interest [Member]
Subsidiary, Sale of Stock [Line Items]
Acquisition of partners' noncontrolling interest	$ 14,100	$ (342)			$ 14,075
ATM Program
Subsidiary, Sale of Stock [Line Items]
Sale of stock, shares issued (in shares) \| shares		917,000		0	917,000	2,900,000
Number of shares settled under forward sales contracts \| shares					2,600,000
Payments of stock issuance costs					$ 1,200		$ 894
Payment of issuance of common stock costs					116,900		$ 88,500		$ 101,400
Sale of stock, maximum of aggregate gross sales price amount					500,000
Sale of stock , sale of stock, remaining aggregate gross sales price amount					$ 276,800
Maximum \| ATM Program
Subsidiary, Sale of Stock [Line Items]
Sale of stock, consideration received on transaction								$ 500,000
Average \| ATM Program
Subsidiary, Sale of Stock [Line Items]
Average price (in dollars per share) \| $ / shares		$ 31.37		$ 30.44	$ 31.37	$ 30.44