Deferred Compensation Benefits - Schedule of Net Periodic Pension Cost (Details) - Deferred Compensation and Other Benefits [Member] - Executive Officer [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 340	$ 263
Interest cost	581	553	$ 483
Expected return on assets	(650)	(597)	(286)
Amortization of actuarial loss	287	328	292
Net periodic pension cost	$ 558	$ 547	$ 489