Derivatives - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2016 USD ($) derivative
Derivative [Line Items]
Interest expense	$ (6,680)	$ (13,678)
Estimated reclassification of cash flow hedge gain (loss) within next twelve months	(75)
Interest rate swap (cash flow hedge)
Derivative [Line Items]
Debt securities, pledged as collateral, available-for-sale, restricted	71,700		$ 83,200
Notional amount	30,000		$ 30,000
Interest rate swap (cash flow hedge) | Cash Flow Hedging
Derivative [Line Items]
Number of derivatives | derivative				2
Notional amount				$ 30,000
Average interest rate				1.10%
Interest expense	$ (65)	$ (62)