Income Taxes - New tax legislation (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Jan. 01, 2018	Dec. 24, 2017	Dec. 24, 2017
Income Taxes
Federal statutory rate (as a percent)	21.00%		35.00%
Income tax benefit to re-measure deferred tax liabilities		$ 0.3
Blended federal statutory rate (as a percent)		31.60%
Maximum percentage of net interest expense deductible as a percent of adjusted taxable income		30.00%
Maximum percentage of net operating losses allowed as a percent of taxable income		80.00%