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Segment and Related Information - Reconciliation of Segment Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Identifiable assets by geographic area [Abstract] |  |
Assets | $ 338,675 | $ 343,749
Long-Lived Assets | 262,386 | 266,845
Goodwill by business segment [Abstract] |  |
Goodwill | 41,214 | 41,214
United States |  |
Identifiable assets by geographic area [Abstract] |  |
Long-Lived Assets | 247,937 | 250,275
Other Countries |  |
Identifiable assets by geographic area [Abstract] |  |
Long-Lived Assets | 14,449 | 16,570
Restaurant and Retail |  |
Goodwill by business segment [Abstract] |  |
Goodwill | 40,478 | 40,478
Government Segment |  |
Goodwill by business segment [Abstract] |  |
Goodwill | 736 | 736
Operating segments | Restaurant and Retail |  |
Identifiable assets by geographic area [Abstract] |  |
Assets | 141,330 | 140,606
Operating segments | Government Segment |  |
Identifiable assets by geographic area [Abstract] |  |
Assets | 13,165 | 13,150
Corporate, Non-Segment |  |
Identifiable assets by geographic area [Abstract] |  |
Assets | $ 184,180 | $ 189,993

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