v2.4.0.8

Concentrations - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Accounts Receivable | Government-based Programs, Medicare and Medicaid |  |  |
Concentration Risk [Line Items] |  |  |
Concentration Risk, Percentage | 80.00% |  |
Dialysis And Related Lab Services | Sales Revenue, Services, Net | Supplier Concentration Risk |  |  |
Concentration Risk [Line Items] |  |  |
Concentration Risk, Percentage | 3.00% | 3.00% |
Dialysis And Related Lab Services | Sales Revenue, Services, Net | Government-based Programs, Medicare and Medicaid |  |  |
Concentration Risk [Line Items] |  |  |
Concentration Risk, Percentage | 66.00% | 66.00% | 66.00%
Accounts receivable, and other receivables, from Medicare and Medicaid-assigned plans | $ 679,006 | $ 629,178 |
HealthCare Partners (HCP) |  |  |
Concentration Risk [Line Items] |  |  |
Number of health plans | 3 |  |
HealthCare Partners (HCP) | Sales Revenue, Services, Net | Government-based Programs, Medicare and Medicaid |  |  |
Concentration Risk [Line Items] |  |  |
Concentration Risk, Percentage | 69.00% |  |
HealthCare Partners (HCP) | Sales Revenue, Services, Net | Product Concentration Risk |  |  |
Concentration Risk [Line Items] |  |  |
Concentration Risk, Percentage | 67.00% |  |
HealthCare Partners (HCP) | Accounts Receivable |  |  |
Concentration Risk [Line Items] |  |  |
Concentration Risk, Percentage | 69.00% |  |

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- Definition Description of risks that arise due to the volume of business transacted with a three health plans. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures). + References No definition available. + Details
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- Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Definition This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Subparagraph a, b -Article 5 + Details
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