Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Apr. 17, 2019
Finite Lived Intangible Assets [Line Items]
Carrying value of goodwill	$ 31,206,000	$ 412,000
Impairment of goodwill recognized	0	$ 0
Carrying value of intangible asset	$ 3,338,000
Mortgage Servicing Rights
Finite Lived Intangible Assets [Line Items]
Weighted average amortization period	5 years 2 months 12 days	7 years 6 months
Amount of mortgage loans sold and servicing rights retained	$ 82,900,000	$ 1,600,000	$ 11,900,000
Net gains recognized in gain on loans held for sale	685,000	36,000	$ 182,000
Fair value of mortgage servicing rights portfolio	1,500,000	$ 1,000,000
Optima Bank And Trust Company
Finite Lived Intangible Assets [Line Items]
Carrying value of goodwill				$ 30,794,000
Optima Bank And Trust Company | Core Deposit Intangibles
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired	3,600,000
Amortization of intangible asset	270,000,000
Carrying value of intangible asset	$ 3,300,000
Weighted average amortization period	9 years