Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jul. 27, 2019	Apr. 27, 2019
Assets:
Cash equivalents	$ 31,433	$ 19,529
DPP receivable - receivables securitization program	50,155	57,238
DPP receivable - customer financing	110,753	121,657
Derivative instruments	149	380
Total assets	192,490	198,804
Liabilities:
Derivative instruments	6,625	3,194
Fair Value, Inputs, Level 1
Assets:
Cash equivalents	31,433	19,529
DPP receivable - receivables securitization program	0	0
DPP receivable - customer financing	0	0
Derivative instruments	0	0
Total assets	31,433	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	149	380
Total assets	149	380
Liabilities:
Derivative instruments	6,625	3,194
Fair Value, Inputs, Level 3
Assets:
Cash equivalents	0	0
DPP receivable - receivables securitization program	50,155	57,238
DPP receivable - customer financing	110,753	121,657
Derivative instruments	0	0
Total assets	160,908	178,895
Liabilities:
Derivative instruments	$ 0	$ 0