Derivatives (Details) - Summary of interest rate swap designated as a cash flow hedges - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Summary of interest rate swap designated as a cash flow hedges [Abstract]
Notional amount	$ 175,000	$ 100,000	$ 75,000
Weighted average pay rates	1.83%	1.68%	1.70%
Weighted average receive rates	2.53%	2.12%	2.19%
Weighted average maturity	1 year 6 months	1 year 8 months 12 days	2 years
Fair value	$ (380)	$ 1,906	$ 1,159