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Goodwill and Intangible Assets - Summary of Intangible Assets, Net (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 871,821 | $ 567,195
Accumulated Amortization | (203,292) | (142,976)
Net Carrying Value | 668,529 | 424,219
Physician And Hospital Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 347,862 | 265,465
Accumulated Amortization | (168,488) | (130,050)
Net Carrying Value | 179,374 | 135,415
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 443,300 | 248,880
Accumulated Amortization | (27,368) | (10,612)
Net Carrying Value | 415,932 | 238,268
Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 43,156 | 28,620
Accumulated Amortization | (1,604) | (597)
Net Carrying Value | 41,552 | 28,023
Patented and Other Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 37,503 | 24,230
Accumulated Amortization | (5,832) | (1,717)
Net Carrying Value | $ 31,671 | $ 22,513

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- 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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