Annual report pursuant to Section 13 and 15(d)

Financial Information from Continuing Operations By Geographic Region (Detail)

v2.4.0.8
Financial Information from Continuing Operations By Geographic Region (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Aug. 31, 2013
May 31, 2013
Feb. 28, 2013
Nov. 30, 2012
Aug. 31, 2012
May 31, 2012
Feb. 29, 2012
Nov. 30, 2011
Aug. 31, 2013
Aug. 31, 2012
Aug. 31, 2011
Geographic Reporting Disclosure [Line Items]                      
Assets of Disposal Group, Including Discontinued Operation $ 272,606       $ 0       $ 272,606 $ 0  
Net sales 327,260 344,205 300,468 307,809 322,368 343,268 300,919 309,966 1,279,742 1,276,521 1,159,310
Long-Lived Assets 205,181       119,620       205,181 119,620  
United States
                     
Geographic Reporting Disclosure [Line Items]                      
Net sales                 549,057 599,831 479,070
Long-Lived Assets 41,161       50,950       41,161 50,950  
Norway
                     
Geographic Reporting Disclosure [Line Items]                      
Long-Lived Assets 59,557       941       59,557 941  
Netherlands
                     
Geographic Reporting Disclosure [Line Items]                      
Net sales                 159,396 185,112 207,787
Long-Lived Assets 10,418       12,166       10,418 12,166  
United Kingdom
                     
Geographic Reporting Disclosure [Line Items]                      
Net sales                 144,131 141,037 116,935
Long-Lived Assets 54,136       17,672       54,136 17,672  
Australia
                     
Geographic Reporting Disclosure [Line Items]                      
Net sales                 68,255 47,472 27,854
France
                     
Geographic Reporting Disclosure [Line Items]                      
Net sales                 52,806 48,681 49,971
China
                     
Geographic Reporting Disclosure [Line Items]                      
Long-Lived Assets 19,551       20,166       19,551 20,166  
All other
                     
Geographic Reporting Disclosure [Line Items]                      
Net sales                 306,097 254,388 277,693
Long-Lived Assets $ 20,358       $ 17,725       $ 20,358 $ 17,725