Pension Plans - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	May 31, 2014 USD ($)	Dec. 31, 2013 defined_benfit_plan
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans | defined_benfit_plan							2
Plan assets	$ 0	$ 0	$ 0		$ 0
Cost of goods sold	267,991	256,367	231,415
Operating expenses	$ 103,355	$ 107,831	$ 112,843
Discount rate	0.10%	0.10%
Reclassification out of Accumulated Other Comprehensive Income
Defined Benefit Plan Disclosure [Line Items]
Cost of goods sold				$ 200
Operating expenses				$ 100
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Plan assets						$ 2,000
Receivable from LAPIS						$ 300