Income Taxes Income Taxes (Effective Tax Rate) (Details)		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%	21.00%	35.00%
State taxes, net of federal tax		2.20%	2.60%	2.90%
Nondeductible capitalized transaction costs		0.00%	0.00%	0.20%
Nondeductible compensation expense		0.50%	0.20%	0.20%
Nondeductible (permanent) items		0.30%	0.20%	0.90%
IRC Section 199 manufacturing deduction		0.00%	0.10%	2.50%
Changes in tax rates, including 2017 Tax Act		0.00%	(0.20%)	(4.40%)
Excess windfall benefit of stock compensation		0.90%	(0.20%)	(2.30%)
Other items		0.10%	0.00%	(0.20%)
Effective tax rate		25.00%	23.70%	29.80%