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Debt Securities (Detail Textuals) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]      
Tax provision related to realized gain $ 0   $ 2
Fair value of pledged securities 2,583 $ 2,183  
Impairment charges 0 0 $ 0
Federal Home Loan Bank of New York (FHLB)      
Schedule of Available-for-sale Securities [Line Items]      
Fair value of pledged securities 120,673 108,955  
Securities pledged borrowed amount 114,963 103,351  
Federal Reserve Bank of New York (FRB)      
Schedule of Available-for-sale Securities [Line Items]      
Fair value of pledged securities 25,025 19,803  
Securities pledged borrowed amount $ 24,177 $ 19,370