Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Assets [Abstract]
Restricted Insurance Settlement	$ 20,278	$ 21,171
Uncertain Tax Positions	4,861	4,543
Supplemental Retirement Income Program	1,491	1,594
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	3,656	1,184
Other	1,769	1,557
Total	$ 32,055	$ 30,049