Revenue - Schedule of Revenue by Payer Type as a Percentage of Revenue (Detail) - Customer Concentration Risk - Total revenue	3 Months Ended	9 Months Ended
Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	100.00%	100.00%	100.00%	100.00%
Medicaid MCO
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	50.90%	53.30%	51.60%	53.90%
Medicaid
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	21.60%	24.60%	21.80%	24.40%
Commercial
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	8.40%	9.70%	9.40%	11.10%
Medicare
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	19.00%	12.10%	17.10%	10.30%
Self-pay
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	0.10%	0.30%	0.10%	0.30%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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