Nature of Business and Organization	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Organization	Nature of Business and OrganizationFirst Watch Restaurant Group, Inc. (collectively with its wholly-owned subsidiaries, “the Company,” or “Management”) is a Delaware holding company. The Company operates and franchises restaurants in 29 states operating under the “First Watch” trade name, which are focused on made-to-order breakfast, brunch and lunch. The Company does not operate outside of the United States and all of its assets are located in the United States. As of March 31, 2024, the Company operated 432 company-owned restaurants and had 99 franchise-owned restaurants