Accrued Expenses and Other Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2022

Accrued Expenses and Other Current Liabilities [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities

(in US$ thousands)	June 30, 2022		December 31, 2021
Wages and employee benefits	$	37,392	$	41,187
Taxes other than income taxes		8,384		6,246
Accrued royalties		104,952		70,237
Accrued freight costs		42,104		27,754
Accrued mining fees		104,694		65,835
Acquisition related accruals		29,623		31,201
Other liabilities		14,652		28,482
Total accrued expenses and other current liabilities	$	341,801	$	270,942