Derivatives - Additional Information (Detail) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2016 USD ($) derivative
Derivative [Line Items]
Interest expense		$ 10,454	$ 15,650	$ 24,132	$ 30,221
Estimated decrease in interest expense	$ (239)
Interest rate swap (cash flow hedge)
Derivative [Line Items]
Available for sale securities pledged for collateral	105,000	105,000		105,000		$ 30,000
Interest rate swap (cash flow hedge) | Cash Flow Hedging
Derivative [Line Items]
Number of derivatives | derivative							2
Notional amount	$ 30,000	$ 30,000		30,000			$ 30,000
Average interest rate							1.10%
Interest expense				$ 74	$ 238