Basis of Presentation and Summary of Significant Accounting Policies - Disaggregation of Revenue by Each Payor Type (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 263,258	$ 176,058
Commercial
Disaggregation of Revenue [Line Items]
Revenue	42,140	32,266
Medicare
Disaggregation of Revenue [Line Items]
Revenue	133,659	64,677
Medicaid
Disaggregation of Revenue [Line Items]
Revenue	71,663	69,664
Other third parties
Disaggregation of Revenue [Line Items]
Revenue	$ 15,796	$ 9,451

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details