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Business Combinations (Details) - USD ($)
12 Months Ended
Aug. 31, 2021
Aug. 16, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Combination, Separately Recognized Transactions          
Goodwill     $ 109,439,000 $ 8,754,000  
Transaction-related expenses     8,911,000 $ 440,000 $ 667,000
Zio          
Business Combination, Separately Recognized Transactions          
Business acquisition, equity and voting interests acquired   100.00%      
Contingent consideration   $ 22,543,000      
Intangible assets   $ 41,670,000      
Weighted-average amortization period (in years)   7 years      
Goodwill   $ 70,576,000      
Transaction-related expenses     3,400,000    
Zio | Trademarks          
Business Combination, Separately Recognized Transactions          
Intangible assets   8,500,000      
Zio | Customer Relationships And Non-Compete Agreements          
Business Combination, Separately Recognized Transactions          
Intangible assets   33,200,000      
Zio | Customer relationships          
Business Combination, Separately Recognized Transactions          
Intangible assets   $ 30,000,000      
Weighted-average amortization period (in years)   7 years      
Zio | Non-competition agreements          
Business Combination, Separately Recognized Transactions          
Intangible assets   $ 3,000,000      
Weighted-average amortization period (in years)   5 years      
Zio | Maximum          
Business Combination, Separately Recognized Transactions          
Contingent consideration   $ 35,000,000      
Star Waggons          
Business Combination, Separately Recognized Transactions          
Business acquisition, equity and voting interests acquired 100.00%        
Contingent consideration $ 0        
Intangible assets $ 33,480,000        
Weighted-average amortization period (in years) 7 years        
Goodwill $ 30,109,000        
Transaction-related expenses     2,400,000    
Star Waggons | Studio          
Business Combination, Separately Recognized Transactions          
Change in goodwill     $ 0    
Star Waggons | Trademarks          
Business Combination, Separately Recognized Transactions          
Intangible assets 8,600,000        
Star Waggons | Customer Relationships And Non-Compete Agreements          
Business Combination, Separately Recognized Transactions          
Intangible assets 24,900,000        
Star Waggons | Customer relationships          
Business Combination, Separately Recognized Transactions          
Intangible assets $ 22,500,000        
Weighted-average amortization period (in years) 7 years        
Star Waggons | Non-competition agreements          
Business Combination, Separately Recognized Transactions          
Intangible assets $ 2,300,000        
Weighted-average amortization period (in years) 5 years