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Notes Payable and Credit Facility - Additional Information (Detail) - USD ($)
Sep. 03, 2016
Jul. 26, 2013
Jul. 11, 2013
Sep. 02, 2016
Debt Instrument [Line Items]        
Long-term Federal Home Loan Bank Advances       $ 21,500,000
Long-term Purchase Commitment, Period 5 years      
Federal home loan bank advances, long-term non-callable period 3 years      
Federal home loan Bank, advances, general debt obligations, disclosures, repayment and penalties $ 0      
Federal home loan bank, advances, branch of FHLB Bank, interest rate (percent)       1.73%
Current borrowing capacity   $ 100,000,000.0    
Expiration period   5 years    
Maximum borrowing capacity under credit facility   $ 150,000,000.0    
Federal Home Loan Bank of Cincinnati        
Debt Instrument [Line Items]        
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances     $ 85,000,000.0  
Federal home loan bank advances long-term, duration     20 years  
Federal home loan bank advances, long-term non-callable period     3 years  
Federal home loan Bank, advances, general debt obligations, disclosures, repayment and penalties     $ 0  
Federal home loan bank, advances, branch of FHLB Bank, interest rate (percent)     5.03%