Shareholders' Equity - Share Issuances and Share Awards (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) installment trustee shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common shares | $	$ 33,796
Number of trustees | trustee	9
2009 Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	649,198	241,800
Number of installments | installment	5
Unvested shares (in shares)	591,879	288,681	231,301
2025 (in shares)	176,976
2026 (in shares)	162,596
2027 (in shares)	143,675
2028 (in shares)	108,632
Estimated future compensation expense for the unvested shares | $	$ 2,222
Weighted average period of recognition of compensation expenses (in years)	23 months
Compensation expense | $	$ 1,662	$ 2,257
Shares available for issuance under plan (in shares)	94,000
Officers and Other Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common shares (in shares)	544,555	210,300
Issuance of common shares | $	$ 1,160	$ 1,211
Trustees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	11,627	3,500
Trustees | 2009 Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate market value of shares awarded | $	$ 225	$ 249
Market value of common shares awarded to each trustee (in dollars) | $	$ 25	$ 28