Derivatives designated as a cash flow hedge (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) position	Dec. 31, 2014 USD ($) position	Oct. 23, 2010 USD ($)
Derivative [Line Items]
Notional Amount	$ 11,216	$ 11,498
Life (Years)
Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount			$ 5,200
Pay rate			2.59%
Hedging Instrument [Member] | Pay fixed - receive floating interest rate swap [Member]
Derivative [Line Items]
Number of Positions | position	1	1
Notional Amount	$ 5,155	$ 5,155
Asset	0	0
Liability	$ 212	$ 213
Receive Rate	0.28%	0.23%
Pay rate	2.59%	2.59%
Life (Years)	5 years 2 months 12 days	5 years 9 months 18 days
Hedging Instrument [Member] | Pay fixed receive floating rate interest rate swap [Member]
Derivative [Line Items]
Number of Positions | position	1	1
Notional Amount	$ 10,000	$ 10,000
Asset	0	0
Liability	$ 77	$ 74
Receive Rate	0.18%	0.16%
Pay rate	1.43%	1.43%
Life (Years)	3 years 4 months 24 days	4 years