Income Taxes - Reconciliation (Details)	3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 01, 2018	Dec. 31, 2017	Apr. 01, 2018	Mar. 26, 2017	Mar. 27, 2016
Effective income tax rate reconciliation
Federal statutory rate (as a percent)	21.00%	35.00%	31.30%	34.00%	34.00%
State taxes, net of federal benefit (as a percent)			4.00%	4.60%	4.50%
Non-deductible expenses (as a percent)			4.40%	5.40%	2.10%
Change in deferred tax related to key man life insurance (as a percent)			(7.30%)
Other (as a percent)			(1.90%)	(2.10%)	(0.80%)
Effective rate (as a percent)			30.50%	41.90%	39.80%