Loans (Details 10) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Notes Receivable Net Acquired With Deteriorated Credit Quality	$ 3,687	$ 3,828
One To Four Family Residential Real Estate [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	1,045	1,069
Multi-Family Residential Real Estate [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	300	301
Commercial Real Estate [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	2,024	2,121
Commercial Loan [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	318	337
Loan Purchase [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	4,654	4,793
Notes Receivable Net Acquired With Recorded Investment Net Of Allowance	3,687	3,828
Loan Purchase [Member] | One To Four Family Residential Real Estate [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	1,124	1,154
Loan Purchase [Member] | Multi-Family Residential Real Estate [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	307	309
Loan Purchase [Member] | Commercial Real Estate [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	2,833	2,921
Loan Purchase [Member] | Commercial Loan [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	389	407
Loan Purchase [Member] | Consumer [Member]
Notes Receivable Net Acquired With Deteriorated Credit Quality	$ 1	$ 2