Loans (Analysis of Loan Servicing Rights) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loan Servicing Rights [Roll Forward]
Beginning balance	$ 3,348	$ 2,989	$ 2,767
Loan servicing rights capitalized	1,412	1,406	869
Amortization	(1,267)	(1,047)	(647)
Decrease in impairment reserve	0	0	0
Ending balance	3,493	3,348	2,989
Valuation Allowance [Roll Forward]
Beginning balance	(1)	(2)	(69)
Loan servicing rights capitalized	0	0	0
Amortization	0	0	0
Decrease in impairment reserve	1	1	67
Ending balance	0	(1)	(2)
Total Loan Servicing Rights [Roll Forward]
Beginning Balance	3,347	2,987	2,698
Loan servicing rights capitalized	1,412	1,406	869
Amortization	(1,267)	(1,047)	(647)
Decrease in impairment reserve	1	1	67
Ending balance	$ 3,493	$ 3,347	$ 2,987