Employee Benefit Plans, Noncontributory Defined Benefit Pension Plan (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Plan	Sep. 30, 2018 USD ($)
Employee Benefit Plans [Abstract]
Number of plans | Plan			2
Pension Plan [Member]
Components of net periodic benefit cost [Abstract]
Net periodic benefit cost	$ 74	$ 71	$ 243	$ (21)
Expected employer contribution to pension plan	0		0
Pension Plan [Member] | Salary and Employee Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	78	90	256	269
Pension Plan [Member] | Other Expenses [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	123	164	401	489
Expected return on plan assets	(187)	(230)	(595)	(919)
Net amortization and deferral	$ 60	$ 47	$ 181	$ 140