Loans, Loans Modified in a Troubled Debt Restructuring (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) loan	Sep. 30, 2015 USD ($) loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	116	156
Recorded Investment	$ 9,038	$ 17,713
Unpaid Principal Balance	$ 9,463	$ 18,849
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	10	10
Recorded Investment	$ 2,455	$ 2,410
Unpaid Principal Balance	$ 2,517	$ 3,033
Commercial real estate — owner occupied
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	4
Recorded Investment	$ 117	$ 2,847
Unpaid Principal Balance	$ 124	$ 3,007
Commercial real estate — investor
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	3
Recorded Investment	$ 0	$ 2,949
Unpaid Principal Balance	$ 0	$ 2,998
Real estate construction
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	1
Recorded Investment	$ 66	$ 5
Unpaid Principal Balance	$ 91	$ 5
Residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	56	77
Recorded Investment	$ 4,676	$ 7,393
Unpaid Principal Balance	$ 4,922	$ 7,586
Home equity
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	47	61
Recorded Investment	$ 1,709	$ 2,109
Unpaid Principal Balance	$ 1,793	$ 2,220
Other consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	0
Recorded Investment	$ 15	$ 0
Unpaid Principal Balance	$ 16	$ 0