|
Noncontrolling Interests Subject to Put Provisions and Other Commitments - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended |
|---|---|
|
Mar. 31, 2015
|
|
| Commitments And Contingencies Disclosure [Line Items] | |
| Other potential commitments to provide operating capital to several dialysis centers | $ 1,000 |
| Schedule of Joint ventures to dissolve | Certain consolidated joint ventures are 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 |