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
	Mar. 31, 2021	Mar. 31, 2020
Noninterest income
Service charges	$ 1,256	$ 1,468
ATM/Interchange fees	1,248	894
Wealth management fees	1,146	1,006
Tax refund processing fees	1,900	1,900
Other	412	270
Noninterest Income (in-scope of Topic 606)	5,962	5,538
Noninterest Income (out-of-scope of Topic 606)	3,228	1,338
Total noninterest income	$ 9,190	$ 6,876