Loans and Credit Quality - Restructured Loans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
New troubled debt restructurings	$ 4,234
Existing troubled debt restructurings	12,021
Total Modifications	16,255	$ 13,700
Commercial | Asset Quality Rating - Substandard
Financing Receivable, Modifications [Line Items]
New troubled debt restructurings	4,234
Accrual Status
Financing Receivable, Modifications [Line Items]
New troubled debt restructurings	4,234
Existing troubled debt restructurings	10,702
Total Modifications	14,936
Accrual Status | Commercial | Asset Quality Rating - Substandard
Financing Receivable, Modifications [Line Items]
New troubled debt restructurings	4,234
Nonaccrual Status
Financing Receivable, Modifications [Line Items]
New troubled debt restructurings	0
Existing troubled debt restructurings	1,319
Total Modifications	1,319
Nonaccrual Status | Commercial | Asset Quality Rating - Substandard
Financing Receivable, Modifications [Line Items]
New troubled debt restructurings	$ 0