Fair Value Measurements, By Balance Sheet Grouping (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Financial Assets [Abstract]
Available-for-sale securities	$ 304,792	$ 306,146
Financial Liabilities [Abstract]
Consideration period for recognition of cash and due from banks	90 days
Consideration period for recognition of accrued interest receivable and payable	90 days
Level I [Member]
Financial Assets [Abstract]
Cash and due from banks	$ 10,912	11,423
Interest bearing time deposits with other banks		0
Available-for-sale securities	1,775	1,690
Loans held for sale	1,152	497
Net loans	0	0
Bank owned life insurance	20,615	20,309
Regulatory stock	1,864	2,035
Accrued interest receivable	3,584	3,644
Financial Liabilities [Abstract]
Deposits	544,830	525,166
Borrowed funds	6,287	16,593
Accrued interest payable	674	756
Level II [Member]
Financial Assets [Abstract]
Cash and due from banks	0	0
Interest bearing time deposits with other banks		0
Available-for-sale securities	303,017	304,456
Net loans	0	0
Bank owned life insurance	0	0
Regulatory stock	0	0
Accrued interest receivable	0	0
Financial Liabilities [Abstract]
Deposits	0	0
Borrowed funds	0	0
Accrued interest payable	0	0
Level III [Member]
Financial Assets [Abstract]
Cash and due from banks	0	0
Interest bearing time deposits with other banks	5,969	5,969
Available-for-sale securities		0
Net loans	580,732	564,944
Bank owned life insurance	0	0
Regulatory stock	0	0
Accrued interest receivable	0	0
Financial Liabilities [Abstract]
Deposits	247,647	249,221
Borrowed funds	29,793	21,626
Accrued interest payable	0	0
Carrying Amount [Member]
Financial Assets [Abstract]
Cash and due from banks	10,912	11,423
Interest bearing time deposits with other banks	5,960	5,960
Available-for-sale securities	304,792	306,146
Loans held for sale	1,152	497
Net loans	564,692	547,290
Bank owned life insurance	20,615	20,309
Regulatory stock	1,864	2,035
Accrued interest receivable	3,584	3,644
Financial Liabilities [Abstract]
Deposits	791,887	773,933
Borrowed funds	39,194	41,799
Accrued interest payable	674	756
Fair Value [Member]
Financial Assets [Abstract]
Cash and due from banks	10,912	11,423
Interest bearing time deposits with other banks	5,969	5,969
Available-for-sale securities	304,792	306,146
Loans held for sale	1,152	497
Net loans	580,732	564,944
Bank owned life insurance	20,615	20,309
Regulatory stock	1,864	2,035
Accrued interest receivable	3,584	3,644
Financial Liabilities [Abstract]
Deposits	792,477	774,387
Borrowed funds	36,080	38,219
Accrued interest payable	$ 674	$ 756