Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narratives) (Details)

v3.22.0.1
Summary of Significant Accounting Policies (Narratives) (Details)
 1 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
boardMember
Dec. 31, 2021
USD ($)
performanceObligation
reportingUnit
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Aug. 31, 2020
USD ($)
May 31, 2018
USD ($)
Non-controlling Interest            
Number of performance obligations | performanceObligation   1        
Allowance for doubtful accounts receivable, current   $ 3,900,000 $ 2,800,000      
Impairment of investments   0 0 $ 0    
Impairment of property and equipment   $ 0 0 0    
Number of reporting units | reportingUnit   2        
Goodwill impairment charges   $ 0 0 0    
Intangible asset impairment charges   0 0 0    
Ownership interest (as a percent) 43.00%          
Investment in private companies   25,926,000 15,640,000 5,250,000    
Number of board members | boardMember 2          
Accumulated deficit   (37,988,000) (79,912,000)      
Income tax provision (benefit)   7,667,000 (5,401,000) $ (30,893,000)    
Additional paid-in capital   (1,131,628,000) (1,166,774,000)      
Expected decrease in interest expense in 2021   22,100,000        
Cumulative Effect, Period of Adoption, Adjustment            
Non-controlling Interest            
Accumulated deficit     28,600,000      
Additional paid-in capital     108,500,000      
Convertible notes payable     87,500,000      
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit            
Non-controlling Interest            
Income tax provision (benefit)     900,000      
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-in Capital            
Non-controlling Interest            
Income tax provision (benefit)     6,700,000      
Private Services Company            
Non-controlling Interest            
Investment in private companies $ 1,300,000          
Convertible Notes due 2023            
Non-controlling Interest            
Face amount   345,000,000 345,000,000     $ 345,000,000
Interest rate (as a percent)           1.75%
Convertible Notes due 2025            
Non-controlling Interest            
Face amount   $ 517,500,000 $ 517,500,000   $ 517,500,000  
Interest rate (as a percent)         0.75%