Noncontrolling Interests Subject to Put Provisions and Other Commitments - Additional Information (Detail) $ in Thousands |
9 Months Ended |
|---|---|
|
Sep. 30, 2016
USD ($)
| |
| Commitments And Contingencies Disclosure [Line Items] | |
| Schedule of Joint ventures to dissolve | Certain consolidated partnerships are originally contractually scheduled to dissolve after terms ranging from ten to fifty years. |
| Minimum | |
| Commitments And Contingencies Disclosure [Line Items] | |
| Scheduled dissolution term of joint ventures | 10 years |
| Maximum | |
| Commitments And Contingencies Disclosure [Line Items] | |
| Scheduled dissolution term of joint ventures | 50 years |
| Commitments to provide operating capital | |
| Commitments And Contingencies Disclosure [Line Items] | |
| Other potential commitments to provide operating capital to several dialysis centers | $ 14 |