Loans Receivable, Part II (Details) - USD ($)		Dec. 31, 2019	Dec. 31, 2018
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		$ 6,465,000	$ 6,950,000
Current	[1]	1,381,566,000	1,372,198,000
Total Loans		1,388,031,000	1,379,148,000
Loan Receivable, Nonaccrual Status		2,000,000	990,000,000,000
1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	1,185,000	1,807,000
Loan Receivable, 1 to 59 Days Past Due, Nonaccrual Status		53,000	422,000
60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	648,000	118,000
Loan Receivable, 60 to 89 Days Past Due, Nonaccrual Status		291,000	118,000
Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		4,632,000	5,025,000
90 or more days past due		0	0
Residential Real Estate [Member] | One-to-Four Family [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		5,786,000	5,433,000
Current	[1]	474,494,000	484,546,000
Total Loans		480,280,000	489,979,000
Residential Real Estate [Member] | One-to-Four Family [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	1,179,000	1,523,000
Residential Real Estate [Member] | One-to-Four Family [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	638,000	76,000
Residential Real Estate [Member] | One-to-Four Family [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		3,969,000	3,834,000
Residential Real Estate [Member] | Multi Family [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		360,000	937,000
Current	[1]	584,499,000	596,150,000
Total Loans		584,859,000	597,087,000
Residential Real Estate [Member] | Multi Family [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	0
Residential Real Estate [Member] | Multi Family [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Residential Real Estate [Member] | Multi Family [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		360,000	937,000
Residential Real Estate [Member] | Home Equity [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		10,000	369,000
Current	[1]	18,061,000	19,587,000
Total Loans		18,071,000	19,956,000
Residential Real Estate [Member] | Home Equity [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	216,000
Residential Real Estate [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	10,000	42,000
Residential Real Estate [Member] | Home Equity [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	111,000
Construction and Land [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Current	[1]	37,033,000	13,361,000
Total Loans		37,033,000	13,361,000
Construction and Land [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	0
Construction and Land [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Construction and Land [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		303,000	164,000
Current	[1]	236,400,000	225,358,000
Total Loans		236,703,000	225,522,000
Commercial Real Estate [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	39,000
Commercial Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Commercial Real Estate [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		303,000	125,000
Consumer [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	29,000
Current	[1]	832,000	404,000
Total Loans		832,000	433,000
Consumer [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	29,000
Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Consumer [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Commercial Loans [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		6,000	18,000
Current	[1]	30,247,000	32,792,000
Total Loans		30,253,000	32,810,000
Commercial Loans [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	6,000	0
Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Commercial Loans [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		$ 0	$ 18,000

[1] Includes $990,000 and $1.8 million for December 31, 2018 and 2017, respectively, which are on non-accrual status.

[2] Includes $422,000 and $241,000 for December 31, 2018 and 2017, respectively, which are on non-accrual status.

[3] Includes $118,000 and $15,000 for December 31, 2018 and 2017, respectively, which are on non-accrual status.