Loans - Schedule of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Nonaccrual loans
Total nonaccrual loans	$ 2,638	$ 15,717
Commercial
Nonaccrual loans
Total nonaccrual loans	2,202	15,109
Real estate - mortgage
Nonaccrual loans
Total nonaccrual loans	269	499
Construction and land
Nonaccrual loans
Total nonaccrual loans		27
Consumer
Nonaccrual loans
Total nonaccrual loans	167	82
Manufacturing | Commercial
Nonaccrual loans
Total nonaccrual loans	2	1,045
Finance and insurance | Commercial
Nonaccrual loans
Total nonaccrual loans	25	36
Real estate services | Commercial
Nonaccrual loans
Total nonaccrual loans		91
Construction | Commercial
Nonaccrual loans
Total nonaccrual loans	234	451
Commercial - Other | Commercial
Nonaccrual loans
Total nonaccrual loans	1,941	13,486
Residential and commercial owner-occupied | Real estate - mortgage
Nonaccrual loans
Total nonaccrual loans	$ 269	$ 499