Discontinued Operations - Summary of Assets and Liabilities Held For Sale (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Apr. 25, 2015
Assets held for sale
Total assets held for sale	$ 0	$ 754,141
Liabilities held for sale
Long-term liabilities	$ 0	49,414
Patterson Medical [Member] | Discontinued Operations, Disposed of by Sale [Member]
Assets held for sale
Receivables, net of allowance for doubtful accounts		57,876
Inventory		48,265
Prepaid expenses and other current assets		12,206
Property and equipment, net		22,672
Goodwill		537,175
Identifiable intangibles, net		74,804
Other long-term assets		1,143
Total assets held for sale		754,141
Liabilities held for sale
Accounts payable		26,341
Accrued liabilities and other current liabilities		12,975
Long-term liabilities		49,414
Total liabilities held for sale		$ 88,730