Goodwill and Intangibles - Schedule of Amortizable Intangibles Included in Other Assets on Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Amortizable Intangibles	$ 3,022	$ 3,718
Customer Based [Member] | MoneyWise Payroll [Member]
Finite Lived Intangible Assets [Line Items]
Amortizable Intangibles	394	541
Customer Based [Member] | Hammond Insurance [Member]
Finite Lived Intangible Assets [Line Items]
Amortizable Intangibles	350	375
Customer Based [Member] | LenderSelect [Member]
Finite Lived Intangible Assets [Line Items]
Amortizable Intangibles	648	720
Core Deposits [Member] | River Bancorp, Inc. [Member]
Finite Lived Intangible Assets [Line Items]
Amortizable Intangibles	94	211
Core Deposits [Member] | Virginia Community Bankshares, Inc [Member]
Finite Lived Intangible Assets [Line Items]
Amortizable Intangibles	1,444	1,690
Other [Member]
Finite Lived Intangible Assets [Line Items]
Amortizable Intangibles	$ 92	$ 181