Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Components of net periodic benefit cost
Service cost, included in salaries and employee benefits	$ 305	$ 309	$ 914	$ 923
Other components of net periodic benefit cost:
Interest cost	152	138	456	384
Expected return on plan assets	(324)	(373)	(973)	(1,039)
Amortization of prior service credit	(17)	(16)	(51)	(46)
Recognized net actuarial losses	47	32	141	93
Other components of net periodic benefit cost, included in other noninterest income	(142)	(219)	(427)	(608)
Net periodic benefit cost	$ 163	$ 90	$ 487	$ 315