Trade accounts receivable - net - Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Trade accounts receivable - net
Allowance for credit losses	$ 941	$ 1,079	$ 1,994
Beginning Balance	1,079	1,994
Net additions (reductions) charged to Operations	307	(766)	659
Deductions and Other	(445)	(149)
Ending Balance	$ 941	$ 1,079	$ 1,994