Nature of Banking Activities and Significant Accounting Policies - Additional Information (Details)		12 Months Ended
	Jan. 01, 2019 USD ($)	Dec. 31, 2019 USD ($) Office
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Number of banking offices | Office		11
Number of days past due before a loan is considered nonaccrual		90 days
Lessee, operating lease, option to extend lease term [true false]		true
Uncertain tax positions		$ 0
ASU 2016-02 [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Effect of adoption of new accounting standard	$ 5,600,000
Minimum [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Number of days past due after loan is considered accrual		90 days
Useful lives		3 years
Percentage of tax benefit		50.00%
Minimum [Member] | Software [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Useful lives		3 years
Maximum [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Useful lives		39 years
Maximum [Member] | Software [Member]
Nature of Banking Activities and Significant Accounting Policies [Line Items]
Useful lives		5 years