Investments in Securities and Derivative Instruments - Narrative (Details) - USD ($)			9 Months Ended
	Jul. 10, 2024	Mar. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2024	Jan. 07, 2022	Aug. 31, 2021
Derivatives, Fair Value
Long-term debt, gross			$ 123,470,000		$ 113,459,000
Repayments of Long-term Debt			28,667,000	$ 17,116,000
Investments in marketable equity securities at fair value			1,600,000		1,900,000
Interest rate swap
Derivatives, Fair Value
Unrealized gain on derivative instrument			800,000
Interest rate swap | Level 2
Derivatives, Fair Value
Derivative asset			700,000		1,900,000
Unsecured debt | Contrail Debt
Derivatives, Fair Value
Interest rate stated percentage (as a percentage)						4.68%
Long-term debt, gross			16,423,000		28,394,000	$ 43,600,000
Term Note A - MBT | Unsecured debt
Derivatives, Fair Value
Proceeds from interest received	$ 100,000
Term Note G | Unsecured debt | Contrail Debt
Derivatives, Fair Value
Repayments of Long-term Debt		$ 6,700,000
Term Note D - MBT | Unsecured debt
Derivatives, Fair Value
Proceeds from interest received	$ 41,000.0
Parent company | Unsecured debt
Derivatives, Fair Value
Long-term debt, gross			$ 34,917,000		45,679,000
Parent company | Term Loan A | Unsecured debt
Derivatives, Fair Value
Interest rate stated percentage (as a percentage)			3.42%				3.42%
Long-term debt, gross			$ 0		$ 6,955,000