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Regulatory Capital Requirements - Components of Regulatory Capital (Parenthetical) (Detail)
Jun. 30, 2015
Dec. 31, 2014
Home Savings    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Allowance for loan and allowance for unfunded lending commitments, percentage of risk-weighted assets 1.25% 1.25%
United Community    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Allowance for loan and allowance for unfunded lending commitments, percentage of risk-weighted assets 1.25% 1.25%