Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to bad debt reserve for tax purposes of a qualified lender.

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Income Taxes, Income Tax Uncertainties (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Income Tax Uncertainties [Abstract]
Federal corporate tax rate				21.00%	28.10%
Income tax benefit resulting from re-measurement of deferred taxes	$ (251)
Uncertain tax positions				$ 0	$ 0
Unrecaptured pre-1988 Federal bad debt reserve				$ 1,800
Maximum [Member]
Income Tax Uncertainties [Abstract]
Federal corporate tax rate			35.00%
Plan [Member]
Income Tax Uncertainties [Abstract]
Federal corporate tax rate		21.00%
Federal [Member]
Income Tax Uncertainties [Abstract]
Open tax year				2016 2018
New York State [Member]
Income Tax Uncertainties [Abstract]
Open tax year				2016 2018