Accrued Expenses and Other Current Liabilities (Schedule of Accrued Expenses and Other Current Liabilities) (Details) $ in Thousands, $ in Millions	Jun. 30, 2022 AUD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accrued Expenses and Other Current Liabilities [Abstract]
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
Stamp duty payable	$ 43.0		$ 29,600