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Goodwill and Intangible Assets - Summary of Intangible Assets, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 595,107	$ 584,993
Accumulated Amortization	(320,700)	(271,828)
Net Carrying Value	274,407	313,165
Physician And Hospital Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	384,059	375,344
Accumulated Amortization	(269,889)	(222,818)
Net Carrying Value	114,170	152,526
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	156,530	156,530
Accumulated Amortization	(29,595)	(29,595)
Net Carrying Value	126,935	126,935
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	19,990	19,990
Accumulated Amortization	(2,326)	(2,326)
Net Carrying Value	17,664	17,664
Patented and Other Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	34,528	33,129
Accumulated Amortization	(18,890)	(17,089)
Net Carrying Value	$ 15,638	$ 16,040

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
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