Loans Held for Sale - Delinquent and Non-performing Loans Sold During the Period Indicated (Details) - Nonperforming Financial Instruments [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Loans sold	2	3
Proceeds	$ 580	$ 1,170
Net (charge-offs) recoveries	0	(1)
Net gain (loss)	$ 42	$ 63
Multi-family Residential Portfolio Segment [Member]
Loans sold	1	2
Proceeds	$ 284	$ 765
Net (charge-offs) recoveries	0	0
Net gain (loss)	$ 42	$ 63
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans sold	1	1
Proceeds	$ 296	$ 405
Net (charge-offs) recoveries	0	(1)
Net gain (loss)	$ 0	$ 0