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v3.25.1

Franchise Rights Acquired, Goodwill and Other Intangible Assets - Additional Information (Detail) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 29, 2025 USD ($) Segment | Mar. 30, 2024 USD ($) | Dec. 28, 2024 USD ($) | Dec. 30, 2023 USD ($)
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Number of reportable segments | Segment | 1 |  |  |
Number of operating segments | Segment | 1 |  |  |
Finite-lived intangible assets, aggregate amortization expense | $ 5,950,000 | $ 9,290,000 |  |
Goodwill impairment |  | $ 0 |  |
Net book value of goodwill | $ 240,283,000 |  | $ 239,583,000 | $ 243,441,000
Franchise right maturity period | 7 years |  |  |
Behavioral Reporting Unit |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Goodwill impairment | $ 0 |  |  |
Net book value of goodwill | $ 150,541,000 |  |  |
Percentage of goodwill held | 62.70% |  |  |
Behavioral Reporting Unit | Minimum |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Percentage of estimated fair value in excess of carrying amount | 55.00% |  |  |
Clinical Reporting Unit |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Goodwill impairment | $ 0 |  |  |
Net book value of goodwill | $ 89,742,000 |  |  |
Percentage of goodwill held | 37.30% |  |  |
Clinical Reporting Unit | Minimum |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Percentage of estimated fair value in excess of carrying amount | 60.00% |  |  |
All Reporting Units | Minimum |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Percentage of estimated fair value in excess of carrying amount |  | 25.00% |  |
Franchise Rights Acquired | Maximum |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Finite-lived intangible assets, estimated useful life (in years) | 1 year |  |  |
Franchise Rights Acquired | United States |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Net book value of franchise rights acquired | $ 41,078,000 |  |  |
Indefinite-lived intangible assets, impairment charges | $ 27,549,000 | $ 251,431,000 |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] | Asset Impairment Charges | Asset Impairment Charges |  |
Percentage of franchise rights acquired held | 100.00% |  |  |
Franchise Rights Acquired | United Kingdom |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Indefinite-lived intangible assets, impairment charges |  | $ 155,000 |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Asset Impairment Charges |  |
Franchise Rights Acquired | Australia |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Indefinite-lived intangible assets, impairment charges |  | $ 4,074,000 |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Asset Impairment Charges |  |
Franchise Rights Acquired | New Zealand |  |  |  |
Goodwill And Intangible Assets Disclosure [Line Items] |  |  |  |
Indefinite-lived intangible assets, impairment charges |  | $ 2,328,000 |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Asset Impairment Charges |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 + Details
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- Definition Indicates line item in statement of income or comprehensive income that includes impairment of indefinite-lived intangible asset excluding goodwill. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 + Details
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480265/350-10-S45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 49 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-49 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-18 + Details
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