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Subsequent Event - Additional Information (Detail)
12 Months Ended
Jan. 27, 2017
Feb. 05, 2016
Dec. 31, 2016
Subsequent Event [Line Items]      
Remaining ownership percentage intended to be acquired in Passport Research   50.50%  
Ownership interest transfer, description     JFC transferred its limited partner interest in Passport Research and its ownership interest in Passport Holdings to Edward Jones on February 28, 2017.
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Limited partnership interest in Passport Research 49.50%    
Ownership percentage acquired by wholly-owned subsidiary in Passport Research 50.50%