Derivatives (Details) - Summary of interest rate swap designated as a cash flow hedges - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Summary of interest rate swap designated as a cash flow hedges [Abstract]
Notional amount	$ 50,000		$ 50,000
Weighted average pay rates	1.58%		1.58%
Weighted average receive rates	0.26%		0.24%
Weighted average maturity	3 years 328 days		4 years 146 days
Fair value	$ (250)		$ 48