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	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ 111,000		$ 111,000		$ 110,000
Defined Benefit Plan, Service Cost	551	$ 628	2,212	$ 1,612
Defined Benefit Plan, Interest Cost	959	996	2,954	2,442
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(455)	(720)	(1,795)	(2,220)
Defined Benefit Plan, Amortization of Gain (Loss)	(61)	21	229	97
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	994	$ 925	3,600	$ 1,931
The US Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ 3,000		$ 3,000