Business acquisition contingent consideration revenue earn-out period.

No definition available.

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- Definition

Business Combination Contingent Consideration Acquisitions

+ References

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

+ References

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- Definition

Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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-Section 30
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

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- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

+ Details

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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Acquisitions and divestitures - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Clinic	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Cash paid to acquire businesses	$ 16,582	$ 77,236
Contingent earn-out obligations and liabilities assumed associated with acquisitions	11,555
Contingent earn-out obligations	6,562		$ 6,388
Other Accrued Liabilities
Business Acquisition [Line Items]
Contingent earn-out obligations	222
Other long-term liabilities
Business Acquisition [Line Items]
Contingent earn-out obligations	6,340
Other companies
Business Acquisition [Line Items]
Contingent earn-out obligations	$ 6,562
Minimum \| Other companies \| EBITDA or Operating Income Performance Targets or Quality Margins
Business Acquisition [Line Items]
Earn-out consideration payment period	1 year
Maximum \| Other companies \| EBITDA or Operating Income Performance Targets or Quality Margins
Business Acquisition [Line Items]
Earn-out consideration payment period	6 years
Dialysis and other businesses
Business Acquisition [Line Items]
Cash paid to acquire businesses	$ 15,677
Deferred purchase price obligations	655
Contingent earn-out obligations and liabilities assumed associated with acquisitions	2,408
Goodwill deductible for tax purposes associated with acquisitions	$ 15,383
Noncompete Agreements
Business Acquisition [Line Items]
Amortizable intangible assets acquired, weighted-average estimated useful lives	5 years
U.S. dialysis and related lab services \| Dialysis and other businesses
Business Acquisition [Line Items]
Number of businesses acquired \| Clinic	1
Foreign Dialysis Centers \| Dialysis and other businesses
Business Acquisition [Line Items]
Number of businesses acquired \| Clinic	4