Accrued Expenses and Other Current Liabilities (Tables)	6 Months Ended
Accrued Expenses and Other Current Liabilities (Tables)	Jun. 30, 2026
Accrued Expenses and Other Current Liabilities [Abstract]
Schedule of Accrued Expenses and Other Current Liabilities	(in US$ thousands) June 30, 2026 December 31, 2025 Wages and employee benefits $ 37,758 $ 42,652 Taxes other than income taxes 7,156 6,440 Accrued royalties 24,714 37,818 Accrued freight costs 35,784 40,964 Accrued mining fees 125,784 132,754 Other liabilities 19,470 15,404 Total accrued expenses and other current liabilities $ 250,666 $ 276,032