Loans - Summary of Recorded Investment by Category for Portfolio Loans Restructured (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	3
Pre-Modification Outstanding Recorded Balance	$ 3,933
Post-Modification Outstanding Recorded Balance	$ 3,933
Non-Covered Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		6	3
Pre-Modification Outstanding Recorded Balance		$ 7,819	$ 520
Post-Modification Outstanding Recorded Balance		$ 7,819	$ 520
Non-Covered Loans | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		3	0
Pre-Modification Outstanding Recorded Balance		$ 7,447	$ 0
Post-Modification Outstanding Recorded Balance		$ 7,447	$ 0
Non-Covered Loans | CRE - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		0	1
Pre-Modification Outstanding Recorded Balance		$ 0	$ 188
Post-Modification Outstanding Recorded Balance		$ 0	$ 188
Non-Covered Loans | Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		3	2
Pre-Modification Outstanding Recorded Balance		$ 372	$ 332
Post-Modification Outstanding Recorded Balance		$ 372	$ 332
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2
Pre-Modification Outstanding Recorded Balance	$ 3,716
Post-Modification Outstanding Recorded Balance	$ 3,716
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1
Pre-Modification Outstanding Recorded Balance	$ 217
Post-Modification Outstanding Recorded Balance	$ 217