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ACQUISITIONS - Allocation of Intangible Assets (Details) - USD ($)		12 Months Ended
	Apr. 24, 2023	Dec. 31, 2023	Jan. 01, 2023	Dec. 12, 2022
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross			$ 68,208,000
Client Partner List
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		$ 69,114,000	58,609,000
Computer software
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		7,825,000	$ 7,208,000
Horn Solutions, Inc.
Finite-Lived Intangible Assets [Line Items]
Total	$ 13,484,000			$ 13,484,000
Indefinite-lived intangible assets, Estimated Fair Value		$ 13,434,000
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	10 years
Arroyo Consulting
Finite-Lived Intangible Assets [Line Items]
Total	$ 11,468,000
Arroyo Consulting | Covenant not to compete
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, estimated fair value	$ 352,000
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	$ 10,946,000
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			3 years

X

- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-1

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 928
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483147/928-340-50-1

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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482665/350-30-50-2

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483154/926-20-50-5

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
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Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

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