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Discontinued Operations - Additional Information (Details) - Patterson Medical [Member] - Discontinued Operations, Disposed of by Sale [Member] - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Aug. 31, 2015
Apr. 30, 2016
Apr. 25, 2015
Apr. 26, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Consideration receivable as per definitive agreement $ 716,886      
Percentage of common units obtained 10.00%      
Ratio of acquirer cash inflows to cash outflows at which common units obtained begin participating in distributions 2.5      
Pre-tax gain on sale   $ 24,328 $ 0 $ 0
Transition services agreement, period of involvement   24 months    
Professional fees   $ 13,692