Loans and Credit Quality - Newly Restructured Loans by Concession (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Pre-modification, number of contracts | Contract	1
Pre-modification, total modification	$ 4,234
Post-modification, number of contracts | Contract	1
Post-modification, total modification	$ 4,234
Commercial | Asset Quality Rating - Substandard
Financing Receivable, Modifications [Line Items]
Pre-modification, number of contracts | Contract	1
Pre-modification, total modification	$ 4,234
Post-modification, number of contracts | Contract	1
Post-modification, total modification	$ 4,234
Rate Modification
Financing Receivable, Modifications [Line Items]
Pre-modification, total modification	0
Post-modification, total modification	0
Rate Modification | Commercial | Asset Quality Rating - Substandard
Financing Receivable, Modifications [Line Items]
Pre-modification, total modification	0
Post-modification, total modification	0
Term Modification
Financing Receivable, Modifications [Line Items]
Pre-modification, total modification	0
Post-modification, total modification	0
Term Modification | Commercial | Asset Quality Rating - Substandard
Financing Receivable, Modifications [Line Items]
Pre-modification, total modification	0
Post-modification, total modification	0
Payment Modification
Financing Receivable, Modifications [Line Items]
Pre-modification, total modification	4,234
Post-modification, total modification	4,234
Payment Modification | Commercial | Asset Quality Rating - Substandard
Financing Receivable, Modifications [Line Items]
Pre-modification, total modification	4,234
Post-modification, total modification	4,234
Combination Modification
Financing Receivable, Modifications [Line Items]
Pre-modification, total modification	0
Post-modification, total modification	0
Combination Modification | Commercial | Asset Quality Rating - Substandard
Financing Receivable, Modifications [Line Items]
Pre-modification, total modification	0
Post-modification, total modification	$ 0