Acquisitions (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Feb. 12, 2018
Jan. 22, 2018
Feb. 28, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 21, 2018
Fair Value of Consideration Transferred for Acquisition [Abstract]              
Total cash consideration         $ 32,235    
Shares issued in conjunction with acquisition         100,115    
Total consideration         132,350    
Previously held equity interest in equity method [1]         39,029    
Total         171,379    
Gain on step acquisition       $ 0 13,644 $ 0  
Carrying value of investments $ 25,400            
Fair Value of Assets Acquired [Abstract]              
Goodwill       $ 196,573 $ 196,573    
Useful life       14 years      
Trademarks [Member]              
Fair Value of Assets Acquired [Abstract]              
Useful life       11 years      
Nutritional Product Manufacturer [Member]              
Acquisitions [Abstract]              
Percentage of entity acquired   92.00%          
Percentage of acquired entity held by third party   8.00%          
Innuvate [Member]              
Acquisitions [Abstract]              
Percentage of entity acquired   73.00%          
Ownership interest in equity method investment             27.00%
Fair Value of Consideration Transferred for Acquisition [Abstract]              
Total cash consideration   $ 17,587          
Shares issued in conjunction with acquisition   5,863          
Total consideration   23,450          
Previously held equity interest in equity method [1]   8,748          
Total   32,198          
Fair Value of Assets Acquired [Abstract]              
Total current assets   6,219          
Fixed assets   9,291          
Total current liabilities   (3,942)          
Other non-current liabilities   0          
Total identifiable net assets acquired   17,768          
Goodwill   17,230          
Fair value of noncontrolling interest   (2,800)          
Total consideration and value to be allocated to net assets   32,198          
Innuvate [Member] | Customer List [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets   5,100          
Useful life       9 years      
Innuvate [Member] | Order Backlog [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets   200          
Useful life       5 months      
Innuvate [Member] | Trademarks [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets   $ 900          
Useful life       7 years      
Treviso, LLC [Member]              
Acquisitions [Abstract]              
Percentage of entity acquired 65.00%            
Ownership interest in equity method investment     35.00%        
Number of shares issued (in shares)     169,560        
Share price (in dollars per share)     $ 49.54        
Fair Value of Consideration Transferred for Acquisition [Abstract]              
Total cash consideration $ 14,648   $ 12,600        
Shares issued in conjunction with acquisition 69,252   8,400        
Total consideration 83,900   $ 21,000        
Previously held equity interest in equity method [1] 30,281            
Total 114,181            
Fair Value of Assets Acquired [Abstract]              
Total current assets 19,659            
Fixed assets 33,282            
Total current liabilities (3,740)            
Other non-current liabilities 0            
Total identifiable net assets acquired 71,701            
Goodwill 42,480            
Fair value of noncontrolling interest 0            
Total consideration and value to be allocated to net assets 114,181            
Treviso, LLC [Member] | Customer List [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets 16,500            
Useful life       9 years      
Treviso, LLC [Member] | Order Backlog [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets 4,700            
Useful life       10 months      
Treviso, LLC [Member] | Trademarks [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets $ 1,300            
Useful life       6 years      
L&W [Member]              
Acquisitions [Abstract]              
Percentage of entity acquired 100.00%            
Fair Value of Consideration Transferred for Acquisition [Abstract]              
Total cash consideration $ 0            
Shares issued in conjunction with acquisition 25,000            
Total consideration 25,000            
Previously held equity interest in equity method 0            
Total 25,000            
Fair Value of Assets Acquired [Abstract]              
Total current assets 7,353            
Fixed assets 114            
Total current liabilities (1,495)            
Other non-current liabilities (1,731)            
Total identifiable net assets acquired 12,241            
Goodwill 12,759            
Fair value of noncontrolling interest 0            
Total consideration and value to be allocated to net assets 25,000            
L&W [Member] | Customer List [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets 6,500            
Useful life       7 years      
L&W [Member] | Order Backlog [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets 900            
Useful life       4 months      
L&W [Member] | Trademarks [Member]              
Fair Value of Assets Acquired [Abstract]              
Intangible assets $ 600            
Useful life       5 years      
[1] The acquisitions of Innuvate and Treviso are considered step acquisitions, and accordingly, the Company remeasured its pre-existing 27% equity interest in Innuvate and 35% of Treviso immediately prior to completion of the acquisition to its estimated fair value of approximately $39.0 million. As a result of the remeasurement, the Company recorded a gain of approximately $13.6 million within other income (expense), during the first quarter of 2018, representing the excess of the approximate $39.0 million estimated fair value of its pre-existing 27% equity interest in Innuvate and 35% equity interest of Treviso over its transaction date carrying value of approximately $25.4 million.