Loans Receivable, Net - Recorded Investment in Non-Accrual Loans by Loan Portfolio Segment Excluding PCI Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	$ 17,849	$ 17,415	$ 20,900
Consumer
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	2,733	2,914
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	207	1,587
Commercial real estate – owner occupied
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	4,811	501
Commercial real estate - investor
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	2,917	5,024
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	$ 7,181	$ 7,389