|
Other Receivables (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Other Receivables, Net, Current [Abstract] | ||
| Other receivables | $ 400,916 | $ 349,090 |
| Supplier rebates and other non-trade receivables | ||
| Other Receivables, Net, Current [Abstract] | ||
| Other receivables | 265,693 | 217,100 |
| Medicare bad debt claims | ||
| Other Receivables, Net, Current [Abstract] | ||
| Other receivables | 118,504 | 110,825 |
| Operating advances under management and administrative services agreements | ||
| Other Receivables, Net, Current [Abstract] | ||
| Other receivables | $ 16,719 | $ 21,165 |