Deposits - Summary of Remaining Time to Maturity for Time Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Certificates of deposit (not jumbo):
Less than one year	$ 468,729	$ 497,148
One year to two years	116,541	140,943
Two years to three years	51,477	36,814
Three years to four years	28,105	39,352
Over four years	9,545	23,192
Total certificates of deposit (not jumbo)	674,397	737,449
Jumbo certificates of deposit (1)
Less than one year	349,396	431,242
One year to two years	66,030	110,851
Two years to three years	35,830	16,590
Three years to four years	30,682	31,584
Over four years	2,510	28,894
Total jumbo certificates of deposit	484,448	619,161
Total customer deposits	1,158,845	$ 1,356,610
Jumbo certificates of deposit from individuals, businesses and municipalities	$ 100