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Capital Markets Issuance of Shares (Tables)
9 Months Ended
Sep. 30, 2026
Equity [Abstract]  
Common And Preferred Shares Disclosure [Text Block]
During the three and nine months ended September 30, 2026, the Company declared cash dividends totaling $0.930 and $2.760 per common share, respectively. Additionally, during the three and nine months ended September 30, 2026, the Company declared cash dividends of $0.359375 and $1.078125 per share, respectively, on each of the Company's 5.75% Series C cumulative convertible preferred shares and the Company's 5.75% Series G cumulative redeemable preferred shares, and cash dividends of $0.5625 and $1.6875 per share, respectively, on the Company's 9.00% Series E cumulative convertible preferred shares. During the three months ended September 30, 2026, 132,998 of the Company's 5.75% Series C cumulative convertible preferred shares converted into 58,704 common shares.

At-the-Market Program ("ATM Program")
On December 5, 2025, the Company entered into an ATM Program, pursuant to which the Company may issue common shares having an aggregate sales price of up to $400.0 million on the open market or in privately negotiated transactions deemed to be “at-the-market” offerings under SEC rules, including through forward sale agreements. Transactions under the ATM Program, if any, will depend on a variety of factors to be determined by the Company, including market conditions, the trading price of the Company's common shares and the Company's capital needs. The Company intends to use any net proceeds from the sale of common shares pursuant to the ATM Program for general corporate purposes, including funding the Company's pipeline of acquisition and build-to-suit projects, working capital and the repayment of the Company's outstanding indebtedness. As of September 30, 2026, the Company had $262.5 million of capacity remaining under the ATM Program.

The use of forward sale agreements allows the Company to lock in a share price on the sale of shares at the time the forward sale agreement becomes effective, but defer receiving the proceeds from the sale of shares until a later date. If the Company enters into a forward sale agreement, it expects to physically settle each forward sale agreement with the forward purchaser on one or more dates specified by the Company prior to the maturity date of that particular forward sale agreement. The aggregate net cash proceeds at settlement will equal the number of shares underlying the particular forward sale agreement multiplied by the relevant forward sale price. The forward sales price will be equal to the volume-weighted average hedge price per share at which the borrowed common shares were sold by the
forward seller, less a per share commission, subject to adjustment. However, the Company may also elect to cash settle or net share settle a particular forward sale agreement, in which case cash proceeds may or may not be received or cash may be owed to the forward purchaser. Until settlement of the forward sale agreements, earnings per share dilution resulting from the forward sale agreements will be determined under the treasury stock method. Share dilution occurs when the average market price of the Company's common shares is higher than the average forward sales price.

The Company did not issue any common shares under its ATM Program during the three and nine months ended September 30, 2026. The following table summarizes activity under the Company's ATM Program in connection with forward sale agreements for the three and nine months ended September 30, 2026 (dollars in thousands except share information):
Period Entered Into Forward Sale AgreementsTotal Forward Shares SoldTotal Forward Shares SettledTotal Forward Shares OutstandingVolume Weighted Average Hedge Share Price (1)Net Proceeds Received (2)Estimated Net Proceeds at September 30, 2026 (3)
Three Months Ended March 31, 2026797,422 — 797,422 $59.52 $— $46,048 
Three Months Ended June 30, 2026392,462 — 392,462 59.70 — 22,880 
Three Months Ended September 30, 20261,095,951 — 1,095,951 60.79 — 65,652 
Total2,285,835 — 2,285,835 $60.16 $— $134,580 
(1) Before payment of commissions and subject to a daily adjustment based on the overnight bank borrowing rate less a spread and reduced by expected dividend payments on the Company's common shares during the term of the applicable forward sale agreement.
(2) After payment of commissions.
(3) Represents estimated net proceeds from forward sale agreements that have not settled as if these agreements had been physically settled for cash as of the date presented. Settlement of these shares is subject to customary closing conditions, and actual net proceeds will be net of costs and certain adjustments calculated on the settlement date.

The Company did not initially receive any proceeds from the sale of forward shares under the ATM Program. The Company has the option to settle the outstanding common shares listed above prior to the maturity dates of the respective forward sale agreements beginning on March 1, 2027 through March 6, 2028, by physical delivery of the outstanding common shares in exchange for cash proceeds.