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Contingencies - Performance Bonds (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Malpractice loss contingency, letters of credit and surety bonds	$ 6,384,000	$ 13,660,000

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- References

No definition available.

+ Details

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- Definition

Amount of letters of credit and other surety bonds that are available for the future payment of malpractice claims.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 450
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6491354&loc=d3e6049-115624

+ Details

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Balance Type:	credit
Period Type:	instant