Loans and Credit Quality - Restructured Loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	$ 1,968
Existing Troubled Debt Restructurings	9,327
Total	11,300	$ 14,800
Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	318
Existing Troubled Debt Restructurings	1,327
Total	1,645
Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	1,650
Existing Troubled Debt Restructurings	8,000
Total	9,650
Commercial | AQR Substandard
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	1,779
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	1,461
Real estate term owner occupied | AQR Substandard
Financing Receivable, Troubled Debt Restructuring [Line Items]
New Troubled Debt Restructurings	189
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	$ 189