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Redeemable Noncontrolling Interest (Details) (USD $)
0 Months Ended 6 Months Ended 1 Months Ended
Mar. 08, 2013
Feb. 28, 2014
Feb. 28, 2013
Mar. 31, 2011
Common Stock [Member]
Subsidiaries [Member]
Redeemable Noncontrolling Interest [Line Items]        
Business Acquisition, Effective Date of Acquisition   Mar. 31, 2011    
Business Acquisition Equity Interests Issued Or Issuable Percent Of Shares Issued       20.00%
Redeemable Noncontrolling Interest Purchase Date   Mar. 08, 2013    
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests $ 25,000,000      
Redeemable Noncontrolling Interest, Equity, Fair Value     25,000,000  
Increase (Decrease) in Temporary Equity [Roll Forward]        
Balances - September 1 (Beginning of period)     22,248,000  
Net loss attributable to noncontrolling interest     903,000  
Currency translation adjustment     (1,059,000)  
Capital contributions from noncontrolling interest holder     1,970,000  
Adjustments to fair value     2,504,000  
Balances - February 28 (End of period)     $ 24,760,000