Note 14 - Employee Benefit Plans (Detail) - Net Periodic Pension Expense (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Total net pension expense   $ 11
Other Pension Plans, Defined Benefit [Member]
   
Service cost   19
Interest cost 1,628 1,974
Expected return on plan assets (1,994) (2,074)
Amortization of net loss 370 774
Other   11
Total net pension expense $ 4 $ 704