Condensed Consolidated Financial Statements (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 29, 2019 USD ($) segment	Mar. 30, 2019 USD ($)
Financial Statement [Line Items]
Number of operating segments | segment	1
Total assets	$ 1,578,454	$ 1,312,288
Total liabilities	859,866	612,778
Operating lease right-of-use assets	201,401
Operating lease obligations	188,967
Finance lease asset	142,066	128,029
Finance lease liability	$ 286,543
Accounting change - cumulative effect		(582)
Accounting Standards Update 2016-02 [Member]
Financial Statement [Line Items]
Total assets		165,300
Total liabilities		165,900
Operating lease right-of-use assets		186,900
Operating lease obligations		174,400
Finance lease asset		700
Finance lease liability		700
Operating lease, asset (liability), difference in assets resulting from favorable leases		19,600
Operating lease, asset (liability), difference in assets resulting from unfavorable lease intangibles and deferred rent		7,200
Lease financial obligations		18,600
Assets related to finance lease construction		11,100
Leased Stores [Member] | Accounting Standards Update 2016-02 [Member]
Financial Statement [Line Items]
Finance lease asset		8,400
Finance lease liability		$ 16,600