Fair Value (Narrative) (Details)	3 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	$ 830,000		$ 2,812,000
Fair value assets and liabilities transfer level 1 to level 3	0		0
Fair value assets and liabilities transfer level 3 to level 1	0		0
Unpaid principal balance of impairment loan at collateral	$ 3,400,000		$ 2,672,000
Valuation allowance	25,000		21,000
Write-downs of impaired collateral-dependent loans	0	$ 0
Loans 90 days or more past due and still accruing interest
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis	0		0
Liabilities measured at fair value on a recurring basis	0		0
Assets measured at fair value on a nonrecurring basis	0		0
Liabilities measured at fair value on a nonrecurring basis	0		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	830,000		2,812,000
Assets measured at fair value on a nonrecurring basis	0		0
Liabilities measured at fair value on a nonrecurring basis	0		0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis	0		0
Liabilities measured at fair value on a recurring basis	$ 0		$ 0