Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Components of net periodic benefit cost
Service cost, included in salaries and employee benefits	$ 316	$ 308	$ 609	$ 614
Other components of net periodic benefit cost:
Interest cost	151	113	304	246
Expected return on plan assets	(319)	(348)	(649)	(666)
Amortization of prior service credit	(17)	(15)	(34)	(30)
Recognized net actuarial losses	52	31	94	60
Other components of net periodic benefit cost, included in other noninterest income	(133)	(219)	(285)	(390)
Net periodic benefit cost	$ 183	$ 89	$ 324	$ 224