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Long-Term Compensation Plan and Stock Based Compensation - Allocation of Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Compensation expense
Stock-based compensation	$ 1,292	$ 860	$ 2,634	$ 2,210
Other long-term compensation plan	275	305	474	670
Total Compensation	$ 1,567	$ 1,165	$ 3,108	$ 2,880

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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