Fair Value (Fair Value, Assets and Liabilities Measured on Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with specific valuation allowances	$ 6,701	$ 4,217
Other real estate owned	1,677	3,274	$ 3,309	$ 3,144
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with specific valuation allowances	0	0
Other real estate owned	0	0
Assets, Fair Value Disclosure, Nonrecurring	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with specific valuation allowances	0	0
Other real estate owned	0	0
Assets, Fair Value Disclosure, Nonrecurring	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with specific valuation allowances	66	50
Other real estate owned	1,677	3,274
Assets, Fair Value Disclosure, Nonrecurring	$ 1,743	$ 3,324