Loans Receivable, Net - Recorded Investment in Non-Accrual Loans by Loan Portfolio Segment Excluding PCI Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	$ 30,304	$ 46,863
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	418	1,908
Commercial real estate – owner occupied
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	12,524	13,751
Commercial real estate – investor
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	8,506	18,287
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	5,505	8,671
Consumer
Financing Receivable, Past Due [Line Items]
Loans with non-accrual of interest	$ 3,351	$ 4,246