Fair Value Measurement and Fair Value of Financial Instruments - Fair Value of Assets Measured on Non-recurring Basis (Detail) - Fair Value, Measurements, Non-recurring - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets:
Individually evaluated loans	$ 5,767	$ 2,417
Properties held for sale	746
(Level 1)
Assets:
Individually evaluated loans	0	0
Properties held for sale	0
(Level 2)
Assets:
Individually evaluated loans	0	0
Properties held for sale	0
(Level 3)
Assets:
Individually evaluated loans	5,767	$ 2,417
Properties held for sale	$ 746