Annual report pursuant to Section 13 and 15(d)

Income Taxes (Summary Of Differences Between The Financial Statement And Tax Bases Of Assets And Liabilities) (Details)

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Income Taxes (Summary Of Differences Between The Financial Statement And Tax Bases Of Assets And Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred Tax Assets:    
Basis difference in fixed assets $ 27,995 $ 26,590
Foreign tax credit carryforward 34,144 34,144
Alternative minimum tax credit carryover   337
U.S. federal net operating losses 32,579 30,572
Foreign net operating losses 24,602 11,770
Asset retirement obligations 3,640 3,407
Operating leases 1,472  
Basis difference in accrued liabilities 368 676
Basis difference in receivables 331 171
Other 1,121 1,120
Total deferred tax assets 126,252 108,787
Valuation allowance $ (126,252) (84,628)
Net deferred tax assets   $ 24,159