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Segment Reporting - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Reconciliation of income from continuing operations from segments to consolidated [Abstract]
Operating income (loss)	$ 2,703	$ (1,867)	$ 5,074	$ (3,231)
Other income, net	1,338	1,271	2,938	2,020
Income (loss) from continuing operations before income taxes	$ 4,041	$ (596)	$ 8,012	$ (1,211)

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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The net result for the period of deducting operating expenses from operating revenues.

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