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Transactions with Related Parties - Additional Information (Detail)
$ in Millions
Apr. 28, 2014
USD ($)
BoardMember
Related Party Transaction [Line Items]  
Number of board members to be nominated by investor | BoardMember 2
SSB [Member]  
Related Party Transaction [Line Items]  
Percentage of ownership interest transferred 50.00%
Proceeds from sale of unconsolidated joint venture assets | $ $ 343.6