Annual report pursuant to Section 13 and 15(d)

Proforma Results of Operations (Detail)

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Proforma Results of Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Aug. 31, 2014
May 31, 2014
Feb. 28, 2014
Nov. 30, 2013
Aug. 31, 2013
May 31, 2013
Feb. 28, 2013
Nov. 30, 2012
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Business Combinations [Abstract]                      
Net sales, As reported $ 354,349 $ 378,187 $ 327,770 $ 339,556 $ 327,260 $ 344,205 $ 300,468 $ 307,809 $ 1,399,862 $ 1,279,742 $ 1,276,521
Net sales, Pro forma                 1,419,915 1,390,251 1,439,493
Earnings from continuing operations, As reported 35,587 50,557 22,304 33,005 45,115 46,077 25,834 30,551 141,453 147,577 125,276
Earnings from continuing operations, Pro forma                 $ 142,589 $ 154,371 $ 134,430
Basic earnings per share from continuing operations, As reported $ 0.52 $ 0.72 $ 0.31 $ 0.45 $ 0.62 $ 0.63 $ 0.35 $ 0.42 $ 1.99 $ 2.02 $ 1.79
Basic earnings per share from continuing operations, Pro forma                 $ 2.01 $ 2.12 $ 1.92
Diluted earnings per share from continuing operations, As reported $ 0.51 $ 0.70 $ 0.30 $ 0.44 $ 0.60 $ 0.62 $ 0.35 $ 0.41 $ 1.95 $ 1.98 $ 1.68
Diluted earnings per share from continuing operations, Pro forma                 $ 1.97 $ 2.07 $ 1.80