Loans and Credit Quality - Restructured Loans (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($) contract	Dec. 31, 2019 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portolfio loans: Interest Only	$ 64,298
Portfolio loans: Full Payment Deferral	293,224
Portfolio loans: Total	$ 357,522
Number of modifications: Total | contract	76,000
Number of modifications: Full Payment Deferrals | contract	403,000
Number of modifications: Interest Only | contract	479,000
New Troubled Debt Restructurings	$ 2,031
Existing Troubled Debt Restructurings	8,605
Total	10,636	$ 10,100
Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	2,031
Existing Troubled Debt Restructurings	856
Total	2,887
Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	0
Existing Troubled Debt Restructurings	7,749
Total	7,749
Commercial | AQR Substandard
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	2,031
Commercial | AQR Substandard | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	2,031
Commercial | AQR Substandard | Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	$ 0