Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Schedule Of Income Taxes [Line Items]
Effective income tax rate	21.00%	21.00%
Valuation allowance recognized	$ 66,134	$ 63,239
Net change in valuation allowance	2,900	(8,600)
Federal net operating loss carry-forward	790,300
Net foreign operating loss carry-forward	69,600
Net state operating tax loss carry-forward	441,600
Deferred foreign withholding taxes	10,313	$ 9,796
Real Estate Investment Trust [Member]
Schedule Of Income Taxes [Line Items]
Federal net operating loss carry-forward	654,700
Expire Between 2025 and 2037 [Member]
Schedule Of Income Taxes [Line Items]
Federal net operating loss carry-forward	748,800
Indefinite Carry-forward [Member]
Schedule Of Income Taxes [Line Items]
Federal net operating loss carry-forward	$ 41,500
Minimum [Member]
Schedule Of Income Taxes [Line Items]
Operating loss carry-forward, expiration year	2025
Foreign and state operating tax loss carry forwards expiration date	2021
Maximum [Member]
Schedule Of Income Taxes [Line Items]
Operating loss carry-forward, expiration year	2037

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Schedule Of Income Taxes [Line Items]

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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