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Long-Term Compensation Plan and Stock Based Compensation - Allocation of Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Compensation expense
Stock-based compensation	$ 347	$ 1,021	$ 2,981	$ 3,231
Other long-term compensation plan	165	260	640	930
Total Compensation	$ 512	$ 1,281	$ 3,621	$ 4,161

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Amount of noncash expense for share-based payment arrangement.

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