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Redeemable Noncontrolling Interest (Details) (USD $)
0 Months Ended 3 Months Ended 1 Months Ended
Mar. 08, 2013
Nov. 30, 2013
Nov. 30, 2012
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     (442,000)    
Currency translation adjustment     (174,000)    
Capital contributions from noncontrolling interest holder     1,970,000    
Balances - November 30 (End of period)     $ 23,602,000