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Investment in DSM Semichem LLC - Schedule of Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Summary of Investment Holdings
Total Assets	$ 538,509	$ 509,375
Long-Term Debt	437,635	421,173
Revenues	707,622	797,963	$ 1,018,878
Net Income (Loss)	(1,010)	$ 1,369	$ (2,407)
DSM Semichem LLC
Summary of Investment Holdings
Total Assets	105,773
Long-Term Debt	31,700
Members' Equity/Partners' Capital	68,513
Revenues	0
Net Income (Loss)	$ (6,240)

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