CONSOLIDATED AND CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Assets
Cash	$ 52	$ 55
Accounts and other receivables, less allowance for doubtful accounts of $1,245 and $940, respectively	64,405	53,569
Inventories	44,418	51,707
Due from affiliates	9,640	13,694
Other current assets	11,131	11,454
Total current assets	129,646	130,479
Property, plant and equipment, at cost	957,515	954,059
Accumulated depreciation	(657,576)	(648,609)
Property, plant and equipment, net	299,939	305,450
Goodwill	16,671	16,671
Right-of-use assets	68,658	67,140
Investment in DSM Semichem LLC	7,106	7,314
Deferred income taxes, net	10,160	9,946
Other assets, net	1,230	1,509
Total assets	533,410	538,509
Liabilities and Partners’ Capital (Deficit)
Current installments of long-term debt and finance lease obligations	14	14
Trade and other accounts payable	57,852	61,599
Product exchange payables	572	798
Due to affiliates	2,418	4,927
Income taxes payable	2,552	1,283
Other accrued liabilities	32,828	46,880
Total current liabilities	96,236	115,501
Long-term debt, net	451,449	437,635
Finance lease obligations	51	55
Operating lease liabilities	48,430	47,815
Other long-term obligations	8,872	7,942
Total liabilities	605,038	608,948
Commitments and contingencies
Partners’ capital (deficit)	(71,628)	(70,439)
Total liabilities and partners' capital (deficit)	$ 533,410	$ 538,509
Other Receivable, after Allowance for Credit Loss, Current, Related Party, Type [Extensible Enumeration]	Affiliated Entity [Member]	Affiliated Entity [Member]
Other Liability, Current, Related Party, Type [Extensible Enumeration]	Affiliated Entity [Member]	Affiliated Entity [Member]