FAIR VALUE MEASUREMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023	Mar. 31, 2025	Dec. 25, 2022
Total Fair Value
Fair Value Measurement [Line Items]
Cash and cash equivalents	$ 24,510	$ 22,536
Total Fair Value | Restricted Assets
Fair Value Measurement [Line Items]
Restricted cash and cash equivalents	19,510	38,564
Cash, cash equivalents and restricted cash	44,020	61,100
Restricted investments classified as held-to-maturity	71,016	98,592
Total Fair Value | Restricted Assets | Municipal debt securities
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	7,836	22,355
Total Fair Value | Restricted Assets | Corporate debt securities
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	50,334	63,512
Total Fair Value | Restricted Assets | Agency mortgage-backed securities
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	4,873	11,754
Total Fair Value | Restricted Assets | U.S. government and agency securities
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	7,973	971
Cash, cash equivalents and restricted cash	44,020	61,100	$ 99,306		$ 135,631
Restricted investments classified as held-to-maturity	71,016	98,592
Goodwill	42,496	24,543	84,114
Goodwill, impairment charge		(59,074)
Indefinite-lived trade name/trademarks	4,600	4,800
Goodwill and intangible asset impairment charge	200	59,674	9,485
Impairment, Long-Lived Asset, Held-for-Use	18,366	0	0
Operating lease right-of-use asset
Fair Value Measurement [Line Items]
Impairment, Long-Lived Asset, Held-for-Use	13,000
Leaseholds and Leasehold Improvements
Fair Value Measurement [Line Items]
Impairment, Long-Lived Asset, Held-for-Use	5,200
2520 Office Furniture
Fair Value Measurement [Line Items]
Impairment, Long-Lived Asset, Held-for-Use	200
PeopleScout MSP
Fair Value Measurement [Line Items]
Goodwill		800		$ 800
PeopleScout
Fair Value Measurement [Line Items]
Goodwill, impairment charge		(59,100)	(8,900)
Indefinite-lived trade name/trademarks	2,100	2,100	2,100
PeopleManagement
Fair Value Measurement [Line Items]
Goodwill	1,491	1,491	1,491
Goodwill, impairment charge		0
Indefinite-lived trade name/trademarks	2,500	2,700	3,300
Impairment charge		(600)	$ (600)
Impairment of Intangible Assets (Excluding Goodwill)	200
Municipal debt securities
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	7,836	22,355
Corporate debt securities
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	50,334	63,512
Agency mortgage-backed securities
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	4,873	11,754
U.S. government and agency securities
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	7,973	971
Restricted Assets | Quoted prices in active markets for identical assets (level 1)
Fair Value Measurement [Line Items]
Cash, cash equivalents and restricted cash	44,020	61,100
Restricted investments classified as held-to-maturity	0	0
Restricted Assets | Significant other observable inputs (level 2)
Fair Value Measurement [Line Items]
Cash, cash equivalents and restricted cash	0	0
Restricted investments classified as held-to-maturity	71,016	98,592
Restricted Assets | Significant unobservable inputs (level 3)
Fair Value Measurement [Line Items]
Cash, cash equivalents and restricted cash	0	0
Restricted investments classified as held-to-maturity	0	0
Fair Value, Recurring | Quoted prices in active markets for identical assets (level 1)
Fair Value Measurement [Line Items]
Cash and cash equivalents	24,510	22,536
Fair Value, Recurring | Significant other observable inputs (level 2)
Fair Value Measurement [Line Items]
Cash and cash equivalents	0	0
Fair Value, Recurring | Significant unobservable inputs (level 3)
Fair Value Measurement [Line Items]
Cash and cash equivalents	0	0
Fair Value, Recurring | Restricted Assets | Quoted prices in active markets for identical assets (level 1)
Fair Value Measurement [Line Items]
Restricted cash and cash equivalents	19,510	38,564
Fair Value, Recurring | Restricted Assets | Significant other observable inputs (level 2)
Fair Value Measurement [Line Items]
Restricted cash and cash equivalents	0	0
Fair Value, Recurring | Restricted Assets | Significant unobservable inputs (level 3)
Fair Value Measurement [Line Items]
Restricted cash and cash equivalents	0	0
Fair Value, Recurring | Restricted Assets | Municipal debt securities | Quoted prices in active markets for identical assets (level 1)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair Value, Recurring | Restricted Assets | Municipal debt securities | Significant other observable inputs (level 2)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	7,836	22,355
Fair Value, Recurring | Restricted Assets | Municipal debt securities | Significant unobservable inputs (level 3)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair Value, Recurring | Restricted Assets | Corporate debt securities | Quoted prices in active markets for identical assets (level 1)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair Value, Recurring | Restricted Assets | Corporate debt securities | Significant other observable inputs (level 2)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	50,334	63,512
Fair Value, Recurring | Restricted Assets | Corporate debt securities | Significant unobservable inputs (level 3)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair Value, Recurring | Restricted Assets | Agency mortgage-backed securities | Quoted prices in active markets for identical assets (level 1)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair Value, Recurring | Restricted Assets | Agency mortgage-backed securities | Significant other observable inputs (level 2)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	4,873	11,754
Fair Value, Recurring | Restricted Assets | Agency mortgage-backed securities | Significant unobservable inputs (level 3)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair Value, Recurring | Restricted Assets | U.S. government and agency securities | Quoted prices in active markets for identical assets (level 1)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair Value, Recurring | Restricted Assets | U.S. government and agency securities | Significant other observable inputs (level 2)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	7,973	971
Fair Value, Recurring | Restricted Assets | U.S. government and agency securities | Significant unobservable inputs (level 3)
Fair Value Measurement [Line Items]
Restricted investments classified as held-to-maturity	$ 0	$ 0