Fair Value of Financial Instruments (Fair Value by Balance Sheet Grouping) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 60,749	$ 60,707
Interest bearing deposits in banks	2,089	2,603
Investment securities - AFS	136,937	140,000
Investment securities - HTM	98,916	97,981
Restricted bank stock	5,204	5,209
Loans, net	887,746	886,712
Financial derivatives	786	700
Accrued interest receivable	3,471	3,862
Deposits - non-maturity	790,115	773,120
Deposits - time deposits	241,750	245,762
Short-term borrowed funds	35,269	36,000
Long-term borrowed funds	122,120	133,397
Accrued interest payable	442	380
Off balance sheet financial instruments	0	0
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	60,749	60,707
Interest bearing deposits in banks	2,089	2,603
Investment securities - AFS	136,937	140,000
Investment securities - HTM	98,019	97,169
Restricted bank stock	5,204	5,209
Loans, net	882,949	882,008
Financial derivatives	786	700
Accrued interest receivable	3,471	3,862
Deposits - non-maturity	790,115	773,120
Deposits - time deposits	236,753	241,110
Short-term borrowed funds	35,269	36,000
Long-term borrowed funds	120,929	131,737
Accrued interest payable	442	380
Off balance sheet financial instruments	0	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	60,749	60,707
Interest bearing deposits in banks	2,089	2,603
Off balance sheet financial instruments	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities - AFS	116,580	119,746
Investment securities - HTM	89,854	89,031
Restricted bank stock	5,204	5,209
Financial derivatives	786	700
Accrued interest receivable	3,471	3,862
Deposits - non-maturity	790,115	773,120
Deposits - time deposits	241,750	245,762
Short-term borrowed funds	35,269	36,000
Long-term borrowed funds	122,120	133,397
Accrued interest payable	442	380
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities - AFS	20,357	20,254
Investment securities - HTM	9,062	8,950
Loans, net	$ 887,746	$ 886,712