Fair Value Measurements (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Threshold Period for Ordering Appraisal on Impaired Loans, Length of Existing Appraisal	12 months
Length of Time Generally Receive New Appraisal Post Impairment	3 months
Length of Time Generally Receive New Appraisal on Foreclosed Properties	18 months
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount to sell collateral	7.00%
Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount to sell collateral	10.00%