Rationalization Charges Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Rationalization charges	$ 3,195	$ 288	$ 48,594	$ 1,483
Metal containers plant closings and Central States Pension Plan withdrawal [Member]
Restructuring Cost and Reserve [Line Items]
Rationalization charges	40,700
Metal container plant closings [Member]
Restructuring Cost and Reserve [Line Items]
Rationalization charges			808
Metal container plant closings [Member] | Metal containers plant closings and Central States Pension Plan withdrawal [Member]
Restructuring Cost and Reserve [Line Items]
Expected cost	3,700		3,700
Central States Pension Plan withdrawal [Member] | Metal containers plant closings and Central States Pension Plan withdrawal [Member]
Restructuring Cost and Reserve [Line Items]
Expected cost	56,400		$ 56,400
Annually over the next twenty years [Member] | Central States Pension Plan withdrawal [Member]
Restructuring Cost and Reserve [Line Items]
Remaining cash expenditures for this rationalization plan	2,800
Accretion Expense	$ 1,000