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Ownership and Management of the Company (Details) - VoteCo
May. 31, 2015
Timothy T. Janszen  
Ownership and Management of the Company [Line Items]  
Beneficial ownership by third party of shareholder (percent) 42.85%
Ryan L. Langdon  
Ownership and Management of the Company [Line Items]  
Beneficial ownership by third party of shareholder (percent) 42.85%
Roger A. May  
Ownership and Management of the Company [Line Items]  
Beneficial ownership by third party of shareholder (percent) 14.30%