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		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Noninterest income
Service charges	$ 930	$ 1,552	$ 2,398	$ 3,008
ATM/Interchange fees	1,149	951	2,043	1,857
Wealth management fees	904	911	1,910	1,758
Tax refund processing fees	475	550	2,375	2,750
Other	149	265	419	396
Noninterest Income (in-scope of Topic 606)	3,607	4,229	9,145	9,769
Noninterest Income (out-of-scope of Topic 606)	3,247	875	4,585	1,619
Total noninterest income	$ 6,854	$ 5,104	$ 13,730	$ 11,388