Loans and Credit Quality - Restructured Loans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	$ 1,951
Existing Troubled Debt Restructurings	8,269
Total	10,200	$ 14,800
Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	318
Existing Troubled Debt Restructurings	1,180
Total	1,498
Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	1,633
Existing Troubled Debt Restructurings	7,089
Total	8,722
Commercial | AQR Substandard
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	1,765
Commercial | AQR Substandard | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	318
Commercial | AQR Substandard | Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	1,447
Real estate term owner occupied | AQR Substandard
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	186
Real estate term owner occupied | AQR Substandard | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	0
Real estate term owner occupied | AQR Substandard | Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	$ 186