Federal Home Loan Bank Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Federal Home Loan Bank (FHLB) borrowings and advances
Open Repo Plus, Maturing Overnight, Amount	$ 63,430	$ 38,880
Advances, Maturing 2015, Amount	4,000	4,000
Advances, Maturing 2016, Amount	12,000	12,000
Advances, Maturing 2017, Amount	12,000	12,000
Advances, Maturing 2018, Amount	10,000	10,000
Advances, Maturing 2019 and over, Amount	8,000	4,000
Advances from Federal Home Loan Bank	46,000	42,000
Total FHLB borrowings, Amount	$ 109,430	$ 80,880
Open Repo Plus Maturity Overnight, Weighted Average Rate	0.33%	0.27%
Advances Maturing 2015, Weighted Average Rate	0.52%	0.52%
Advances Maturing 2016, Weighted Average Rate	0.81%	0.81%
Advances Maturing 2017, Weighted Average Rate	1.06%	1.06%
Advances Maturing 2018, Weighted Average Rate	1.51%	1.51%
Advances Maturing 2019 and over, Weighted Average Rate	1.76%	1.88%
Total advances, Weighted Average Rate	1.17%	1.12%
Aggregate FHLB borrowings, Weighted Average Rate	0.68%	0.71%