Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2021 USD ($) Office Segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of business segments | Segment	2
Number of branch offices | Office	5
Servicing fees amount	$ (779,000)	$ 1,254,000
Envision Mortgage [Member]
Segment Reporting Information [Line Items]
Premium percentage for new loans	1.50%	1.50%
Premium income	$ 681,000	$ 328,000
Percentage of fees for HELOC	1.00%	1.00%
Servicing fees amount	$ (873,000)	$ 1,167,000
Envision Bank [Member]
Segment Reporting Information [Line Items]
Percentage of loan servicing fees	0.14%	0.14%
Servicing fees amount	$ 94,000	$ 87,000