Derivatives - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2016 USD ($) derivative
Derivative [Line Items]
Interest expense	$ (5,501)	$ (10,454)	$ (12,181)	$ (24,132)
Estimated reclassification of cash flow hedge gain (loss) within next twelve months			(8)
Interest rate swap (cash flow hedge)
Derivative [Line Items]
Debt securities, pledged as collateral, available-for-sale, restricted	53,800		53,800		$ 83,200
Notional amount	10,000		10,000		$ 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%
Derivative liabilities	10,000		10,000
Derivative liability, amount matured	$ 20,000		20,000
Interest rate swap (cash flow hedge) | Cash Flow Hedging | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Interest expense			$ (134)	$ (74)