Loans and Allowance for Loan Losses - Newly classified TDRs (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Interest Modification	$ 40,627
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	240,926
Financing Receivable, Modifications, Recorded Investments	$ 281,553
One- to Four- Family Mortgage Loans Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Number	3
Pre-Modification Balance	$ 266,418
Post-Modification Balance	240,926
Financing Receivable Interest Modification	0
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	240,926
Financing Receivable, Modifications, Recorded Investments	$ 240,926
One To Four Family Investment Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Number	0
Pre-Modification Balance	$ 0
Post-Modification Balance	0
Financing Receivable Interest Modification	0
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	0
Financing Receivable, Modifications, Recorded Investments	$ 0
Multi-Family Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Number	0
Pre-Modification Balance	$ 0
Post-Modification Balance	0
Financing Receivable Interest Modification	0
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	0
Financing Receivable, Modifications, Recorded Investments	$ 0
Nonresidential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Number	0
Pre-Modification Balance	$ 0
Post-Modification Balance	0
Financing Receivable Interest Modification	0
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	0
Financing Receivable, Modifications, Recorded Investments	$ 0
Construction & Land Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Number	0
Pre-Modification Balance	$ 0
Post-Modification Balance	0
Financing Receivable Interest Modification	0
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	0
Financing Receivable, Modifications, Recorded Investments	$ 0
Real Estate Secured Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Number	1
Pre-Modification Balance	$ 0
Post-Modification Balance	40,627
Financing Receivable Interest Modification	40,627
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	0
Financing Receivable, Modifications, Recorded Investments	$ 40,627
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Number	0
Pre-Modification Balance	$ 0
Post-Modification Balance	0
Financing Receivable Interest Modification	0
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	0
Financing Receivable, Modifications, Recorded Investments	$ 0
Other Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Number	4
Pre-Modification Balance	$ 266,418
Post-Modification Balance	281,553
Financing Receivable Interest Modification	0
Financing Receivable Term Modifications	0
Financing Receivable Modifications Combinations	0
Financing Receivable, Modifications, Recorded Investments	$ 0