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Investments In and Advances to Equity Method Investees (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2019
May 24, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]          
Proportionate share of losses     $ 9,465 $ 4,736 $ 1,755
Amount received from escrow in asset acquisition     500 0 0
Gain on disposal of assets     9,600 0 0
Equity Method Investee | Services Agreements          
Schedule of Equity Method Investments [Line Items]          
Income from long-term services agreement     $ 41,500 $ 10,700 $ 400
Minimum          
Schedule of Equity Method Investments [Line Items]          
Economic interest percentage     4.00%    
Voting interest percentage     25.00% 4.00%  
Maximum          
Schedule of Equity Method Investments [Line Items]          
Economic interest percentage     70.00%    
Voting interest percentage     57.00% 40.00%  
Passport | Variable Interest Entity, Not Primary Beneficiary          
Schedule of Equity Method Investments [Line Items]          
Noncontrolling interest in joint ventures 30.00%        
Equity method investment, ownership percentage 70.00%        
Payments to acquire equity method investments $ 70,000        
Equity method investment, ownership percentage 57.00%        
Global Health | Variable Interest Entity, Not Primary Beneficiary          
Schedule of Equity Method Investments [Line Items]          
Equity method investment, ownership percentage   45.00% 43.00%    
Payments to acquire equity method investments   $ 15,000      
Business acquisition, equity interest issued or issuable, number of shares (in shares)   1,577,841      
Gain on disposal of assets   $ 9,600      
Contingent consideration, liability   $ 5,900      
Equity method investment, ownership percentage   29.00%