Derivatives (Details) - Summary of interest rate swap designated as a cash flow hedges - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Summary of interest rate swap designated as a cash flow hedges [Abstract]
Notional amount	$ 75,000		$ 50,000
Weighted average pay rates	1.56%		1.58%
Weighted average receive rates	0.30%		0.24%
Weighted average maturity	4 years 36 days		4 years 146 days
Fair value	$ (1,105)		$ 48