Annual report pursuant to Section 13 and 15(d)

Income Taxes (Components Of The Net Deferred Income Tax Liabilities) (Details)

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Income Taxes (Components Of The Net Deferred Income Tax Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax liabilities:    
Property and equipment $ 114,577 $ 121,840
Long-term debt 10,905 15,395
Gains on marketable securities 340 459
Investments in 50% or less owned companies 774 1,541
Intangible assets 562 706
Deductible goodwill 1,659 1,002
Total deferred tax liabilities 128,817 140,943
Deferred tax assets:    
Federal net operating loss carryforwards 2,022 21,385
State net operating loss carryforwards and other temporary differences 5,804 4,922
Capital loss carryforwards 5,199 5,192
Share award plans 3,853 3,686
Other 5,870 4,314
Total deferred tax assets 22,748 39,499
Valuation allowance (4,846) (4,217)
Net deferred tax assets 17,902 35,282
Net deferred tax liabilities $ 110,915 $ 105,661