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Stock-Based Incentive Plan - Additional Information (Detail) - shares
Jul. 01, 2016
Jan. 01, 2015
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share awards authorized for issuance     3,355,786
Fox Chase Bank [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized 857,191    
Valley Green Bank [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized   473,483