Derivatives (Details) - Summary of interest rate swap designated as a cash flow hedges - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Summary of interest rate swap designated as a cash flow hedges [Abstract]
Notional amount	$ 75,000	$ 75,000	$ 75,000
Weighted average pay rates	1.58%	1.56%	1.56%
Weighted average receive rates	0.70%	0.30%	0.44%
Weighted average maturity	3 years 1 month 6 days	4 years 1 month 6 days	3 years 9 months 18 days
Fair value	$ (1,212)	$ (1,105)	$ (131)