Segment and Related Information - Reconciliation of Segment Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Identifiable assets by geographic area [Abstract]
Assets	$ 906,392	$ 343,749
Long-Lived Assets	320,002	266,845
Goodwill by business segment [Abstract]
Goodwill	459,195	41,214
United States
Identifiable assets by geographic area [Abstract]
Long-Lived Assets	305,757	250,275
Other Countries
Identifiable assets by geographic area [Abstract]
Long-Lived Assets	14,245	16,570
Restaurant/Retail
Goodwill by business segment [Abstract]
Goodwill	458,459	40,478
Government
Goodwill by business segment [Abstract]
Goodwill	736	736
Operating segments | Restaurant/Retail
Identifiable assets by geographic area [Abstract]
Assets	681,344	140,606
Operating segments | Government
Identifiable assets by geographic area [Abstract]
Assets	14,906	13,150
Corporate, Non-Segment
Identifiable assets by geographic area [Abstract]
Assets	$ 210,142	$ 189,993