Revenue Recognition - Summary of Noninterest Income Segregated By Revenue Streams In-scope and Out-of-scope of Topic 606 (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Noninterest income
Service charges	$ 1,414	$ 1,726	$ 3,812	$ 4,733
ATM/Interchange fees	1,183	1,014	3,226	2,871
Wealth management fees	1,006	975	2,916	2,733
Tax refund processing fees			2,375	2,750
Other	214	280	633	675
Noninterest Income (in-scope of Topic 606)	3,817	3,995	12,962	13,762
Noninterest Income (out-of-scope of Topic 606)	2,969	1,434	7,554	3,054
Total noninterest income	$ 6,786	$ 5,429	$ 20,516	$ 16,816