|
FINANCIAL INSTRUMENTS (Details 2) (USD $)
In Thousands, unless otherwise specified |
0 Months Ended | 6 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
Oct. 31, 2012
|
Oct. 31, 2011
|
Oct. 31, 2010
|
Apr. 23, 2007
Treasury lock agreement based on U.S. Treasury security
Cash flow hedges.
|
Oct. 31, 2012
Treasury lock agreement based on U.S. Treasury security
Cash flow hedges.
|
Oct. 31, 2011
Treasury lock agreement based on U.S. Treasury security
Cash flow hedges.
|
Apr. 30, 2007
Treasury lock agreement based on U.S. Treasury security
Cash flow hedges.
agreement
|
Apr. 30, 2007
Treasury lock agreement based on U.S. Treasury security, one and two
Cash flow hedges.
|
Apr. 30, 2007
Treasury lock agreement based on U.S. Treasury security, three
Cash flow hedges.
|
|
| Treasury lock agreements | |||||||||
| Number of treasury lock agreements | 3 | ||||||||
| Amortization period | 30 years | ||||||||
| Principal balance | $ 30,000 | $ 40,000 | |||||||
| Net settlement of unrecognized loss portion recorded in accumulated other comprehensive loss | 182 | ||||||||
| Amount of unrecognized loss portion in accumulated other comprehensive loss | $ (210) | $ (122) | $ (2,793) | $ 149 | $ 155 |