Borrowings - Short-Term Borrowings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Equity Method Investments And Cost Method Investments [Abstract]
Balance at year-end	$ 36,530	$ 37,215
Average balance outstanding	38,680	43,017
Maximum month-end balance	$ 39,665	$ 48,865
Weighted-average rate at year-end	0.12%	0.14%
Weighted-average rate during the year	0.14%	0.21%