Quarterly report pursuant to Section 13 or 15(d)

Guarantor Subsidiaries (Narrative) (Details)

v2.4.0.6
Guarantor Subsidiaries (Narrative) (Details) (6.875% Senior Notes [Member], USD $)
In Thousands, unless otherwise specified
Nov. 30, 2011
Aug. 31, 2011
Jun. 12, 2007
6.875% Senior Notes [Member]
     
Guarantor Obligations [Line Items]      
Issuance of Senior Notes $ 249,456 $ 249,432 $ 250,000
Debt instrument interest rate 6.875%   6.875%