Other Employee Benefit Plans (Details 5) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service costs	$ 0	$ 0	$ 0
Interest costs	96	386	397
Net amortization and deferral	63	235	260
Settlement gain	(608)	0	0
Net periodic pension costs	(449)	$ 621	$ 657
Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract]
Net loss	$ 48