|
Schedule of Fair Value of Derivative Instruments (Detail) (USD $)
In Thousands, unless otherwise specified |
Feb. 28, 2014
|
May 31, 2013
|
|---|---|---|
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | $ 1,839 | $ 761 |
| Liability Derivatives at Fair Value | 4,654 | 9,774 |
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Derivatives Designated As Hedging Instruments
|
||
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | 968 | 425 |
| Liability Derivatives at Fair Value | 4,166 | 9,247 |
|
Derivatives Designated As Hedging Instruments | Interest Rate Contracts
|
||
| Derivative [Line Items] | ||
| Liability Derivatives at Fair Value | 4,166 | 7,895 |
|
Derivatives Designated As Hedging Instruments | Interest Rate Contracts | Other Liabilities
|
||
| Derivative [Line Items] | ||
| Liability Derivatives at Fair Value | 3,863 | |
|
Derivatives Designated As Hedging Instruments | Interest Rate Contracts | Accounts Payable
|
||
| Derivative [Line Items] | ||
| Liability Derivatives at Fair Value | 4,166 | 4,032 |
|
Derivatives Designated As Hedging Instruments | Commodity Contracts
|
||
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | 968 | 425 |
| Liability Derivatives at Fair Value | 1,352 | |
|
Derivatives Designated As Hedging Instruments | Commodity Contracts | Receivables
|
||
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | 968 | 425 |
|
Derivatives Designated As Hedging Instruments | Commodity Contracts | Accounts Payable
|
||
| Derivative [Line Items] | ||
| Liability Derivatives at Fair Value | 1,352 | |
|
Derivatives Not Designated As Hedging Instruments
|
||
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | 871 | 336 |
| Liability Derivatives at Fair Value | 488 | 527 |
|
Derivatives Not Designated As Hedging Instruments | Commodity Contracts
|
||
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | 871 | 331 |
| Liability Derivatives at Fair Value | 283 | 527 |
|
Derivatives Not Designated As Hedging Instruments | Commodity Contracts | Receivables
|
||
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | 871 | 331 |
|
Derivatives Not Designated As Hedging Instruments | Commodity Contracts | Accounts Payable
|
||
| Derivative [Line Items] | ||
| Liability Derivatives at Fair Value | 283 | 527 |
|
Derivatives Not Designated As Hedging Instruments | Foreign Exchange Contracts
|
||
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | 5 | |
|
Derivatives Not Designated As Hedging Instruments | Foreign Exchange Contracts | Receivables
|
||
| Derivative [Line Items] | ||
| Asset Derivatives at Fair Value | 5 | |
|
Derivatives Not Designated As Hedging Instruments | Foreign Exchange Contracts | Accounts Payable
|
||
| Derivative [Line Items] | ||
| Liability Derivatives at Fair Value | $ 205 |