Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Statutory federal tax rate	21.00%	21.00%	35.00%
State income taxes, net of federal benefit	2.10%	2.60%	1.40%
Impact from Tax Reform			(19.30%)
Tax benefit of equity based compensation		(0.10%)	(1.10%)
Noncontrolling interests			0.30%
Audit settlements		(0.30%)
Domestic manufacturing deduction			(2.60%)
Other permanent differences	(0.50%)	(0.70%)	0.10%
Effective tax rate	22.60%	22.50%	13.80%