Income Taxes Income Taxes (Effective Tax Rate) (Details)		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%	35.00%	35.00%
State taxes, net of federal tax		2.60%	2.90%	2.70%
Nondeductible capitalized transaction costs		0.00%	0.20%	1.40%
Nondeductible compensation expense		0.20%	0.20%	0.50%
Nondeductible (permanent) items		0.20%	0.90%	1.00%
IRC Section 199 manufacturing deduction		0.10%	2.50%	3.50%
Changes in tax rates, including 2017 Tax Act		(0.20%)	(4.40%)	1.60%
Changes related to IRC section 382 limitations		0.00%	0.00%	(3.90%)
Excess windfall benefit of stock compensation		(0.20%)	(2.30%)	(3.70%)
Other items		0.00%	(0.20%)	0.50%
Effective tax rate		23.70%	29.80%	31.60%