Commitments and Contingencies (Payments due by period under long-term debt, other financing instruments and commitments) (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Mar. 31, 2018
Commitments and Contingencies [Abstract]
Principal payments on long-term debt, Within 1 year	$ 40
Principal payments on long-term debt, After 5 years	137,682
Principal payments on long-term debt, Total	137,722	$ 148,100
Capital lease commitments/financing obligations, Within 1 year	22,189
Capital lease commitments/financing obligations, 2 to 3 years	50,701
Capital lease commitments/financing obligations, 4 to 5 years	52,953
Capital lease commitments/financing obligations, After 5 years	134,435
Capital lease commitments/financing obligations, Total	260,278
Operating lease commitments, Within 1 year	33,129
Operating lease commitments, 2 to 3 years	52,176
Operating lease commitments, 4 to 5 years	29,294
Operating lease commitments, After 5 years	33,560
Total	148,159
Other liabilities, Within 1 year	800
Other liabilities, 2 to 3 years	1,600
Other liabilities, 4 to 5 years	333
Other liabilities, Total	2,733
Contractual commitments, Within 1 year	56,158
Contractual commitments, 2 to 3 years	104,477
Contractual commitments, 4 to 5 years	82,580
Contractual commitments, After 5 years	305,677
Contractual commitments, Total	$ 548,892