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Stockholders' Equity (RS and SARS Information) (Details 6) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Stockholders' Equity [Abstract]      
Intrinsic value of SARS exercised $ 5,053 $ 506 $ 954
Fair value of SARS vested     2,754
Fair value of restricted stock vested 44,010 34,857 33,413
Tax benefit (expense) for stock based compensation expense [1] 560 991 (351)
Capitalized stock compensation expense [2] 313 $ 387 $ 387
Unrecognized stock-based compensation - restricted stock $ 45,158    
Remaining weighted-average period for restricted stock expense 1 year 4 months 24 days    
[1]

(1)

Classified as income tax expense within the Consolidated Statements of Operations.

[2]

(2)

Classified as inventories within the Consolidated Balance Sheets.