Significant Accounting Policies - Income Taxes - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Dividends Payable [Line Items]
Dividends per share paid (in dollars per share)	$ 3.09	$ 3.16	$ 3.25
SUMMIT
Dividends Payable [Line Items]
Federal, state and local tax provision	$ 3.3	$ 0.7	$ 9.2
Internal Revenue Service (IRS)
Dividends Payable [Line Items]
SUMMIT Operator tax expense	$ 3.7	$ 4.9	$ 8.2
O 2025 A Dividends
Dividends Payable [Line Items]
Dividends per share paid (in dollars per share)	$ 0.16
O 2024 A Dividends
Dividends Payable [Line Items]
Dividends per share paid (in dollars per share)		$ 0.23
O 2023 A Dividends
Dividends Payable [Line Items]
Dividends per share paid (in dollars per share)			$ 0.00
Capital Gains 2025 Dividend
Dividends Payable [Line Items]
Dividends per share paid (in dollars per share)	$ 2.93
Capital Gains 2024 Dividend
Dividends Payable [Line Items]
Dividends per share paid (in dollars per share)		$ 2.93
Capital Gains 2023 Dividend
Dividends Payable [Line Items]
Dividends per share paid (in dollars per share)			$ 3.25