Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Oct. 26, 2019	Apr. 27, 2019
Assets:
Cash equivalents	$ 22,865	$ 19,529
DPP receivable - receivables securitization program	75,561	57,238
DPP receivable - customer financing	102,083	121,657
Derivative instruments	196	380
Total assets	200,705	198,804
Liabilities:
Derivative instruments	8,050	3,194
Fair Value, Inputs, Level 1
Assets:
Cash equivalents	22,865	19,529
DPP receivable - receivables securitization program	0	0
DPP receivable - customer financing	0	0
Derivative instruments	0	0
Total assets	22,865	19,529
Liabilities:
Derivative instruments	0	0
Fair Value, Inputs, Level 2
Assets:
Cash equivalents	0	0
DPP receivable - receivables securitization program	0	0
DPP receivable - customer financing	0	0
Derivative instruments	196	380
Total assets	196	380
Liabilities:
Derivative instruments	8,050	3,194
Fair Value, Inputs, Level 3
Assets:
Cash equivalents	0	0
DPP receivable - receivables securitization program	75,561	57,238
DPP receivable - customer financing	102,083	121,657
Derivative instruments	0	0
Total assets	177,644	178,895
Liabilities:
Derivative instruments	$ 0	$ 0