Pension and Profit Sharing - Plan Asset Allocation (Details)	Dec. 31, 2019	Dec. 31, 2018
Plan asset weighted average allocation	100.00%	100.00%
Equity Securities
Plan asset weighted average allocation	66.00%	65.00%
Fixed Income Securities
Plan asset weighted average allocation	32.00%	33.00%
Other Securities/Investments
Plan asset weighted average allocation	2.00%	2.00%