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ACQUISITIONS - Allocation of Intangible Assets (Details) - USD ($)		12 Months Ended
	Apr. 24, 2023	Dec. 29, 2024	Dec. 31, 2023	Dec. 12, 2022
Client Partner List
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		$ 69,403,000	$ 69,114,000
Computer software
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		9,103,000	$ 7,825,000
Horn Solutions, Inc.
Finite-Lived Intangible Assets [Line Items]
Total	$ 13,484,000			$ 13,484,000
Horn Solutions, Inc. \| Covenant not to compete
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, estimated fair value	$ 50,000
Finite-lived intangible asset, useful life	5 years
Horn Solutions, Inc. \| Client Partner List
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, estimated fair value		13,434,000
Finite-lived intangible asset, useful life	10 years
Arroyo Consulting
Finite-Lived Intangible Assets [Line Items]
Total	$ 11,468,000	11,761,000
Arroyo Consulting \| Covenant not to compete
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, estimated fair value		$ 356,000
Finite-lived intangible asset, useful life		5 years
Arroyo Consulting \| Client Partner List
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, estimated fair value		$ 11,235,000
Finite-lived intangible asset, useful life		10 years
Arroyo Consulting \| Computer software
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		$ 170,000
Finite-lived intangible asset, useful life		5 years