Deposits - Summary of Remaining Time to Maturity for Time Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Certificates of deposit (not jumbo):
Less than one year	$ 497,148	$ 228,045
One year to two years	140,943	94,488
Two years to three years	36,814	14,441
Three years to four years	39,352	4,048
Over four years	23,192	5,927
Total certificates of deposit (not jumbo)	737,449	346,949
Jumbo certificates of deposit (1)
Less than one year	431,242	223,798
One year to two years	110,851	91,486
Two years to three years	16,590	5,957
Three years to four years	31,584	2,399
Over four years	28,894	2,353
Total jumbo certificates of deposit	619,161	325,993
Total customer deposits	$ 1,356,610	$ 672,942