v3.19.3.a.u2
Long-Term Debt - Additional Information (Details)
1 Months Ended 12 Months Ended
Aug. 31, 2019
USD ($)
d
$ / shares
shares
Aug. 31, 2018
USD ($)
Jul. 31, 2016
USD ($)
Dec. 31, 2019
USD ($)
$ / shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Aug. 06, 2019
$ / shares
Feb. 28, 2018
USD ($)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]                  
Proceeds from issuance of convertible notes, net of issuance costs       $ 1,251,411,000 $ 0 $ 0      
Five-Year Senior Unsecured Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Credit facility expiration period     5 years            
Maximum borrowing capacity   $ 1,050,000,000.00 $ 1,100,000,000         $ 1,250,000,000 $ 1,200,000,000
Annual commitment fee     0.10%            
Origination fees     $ 0            
Credit facility expiration date   2023-08              
Amounts outstanding under the credit facility       0          
Standby Letters of Credit                  
Debt Instrument [Line Items]                  
Outstanding letters of credit       25,500,000          
LIBO | Five-Year Senior Unsecured Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Basis spread on variable interest rate (percentage)     0.75%            
Convertible Senior Notes                  
Debt Instrument [Line Items]                  
Debt instrument, principal amount $ 1,265,000,000     $ 1,265,000,000          
Indenture date Aug. 09, 2019                
Proceeds from issuance of convertible notes, net of issuance costs $ 1,150,000,000                
Interest payment beginning date Feb. 01, 2020                
Debt instrument, interest rate 0.75%                
Debt instrument, interest rate terms       Interest is payable in cash semi-annually in arrears beginning on February 1, 2020 at a rate of 0.75% per year.          
Debt instrument, maturity date Aug. 01, 2026                
Debt instrument, redemption price percentage 100.00%                
Carrying amount of equity component $ 381,500,000     $ 377,432,000          
Effective interest rate 6.22%                
Debt issuance costs allocated to equity component $ 4,100,000                
Debt issuance costs allocated to liability component $ 9,500,000                
Debt instrument convertible, amortization period       6 years 7 months 6 days          
Cap price, net cost       $ 102,100,000          
Convertible Senior Notes | Class A Non-voting Common Stock                  
Debt Instrument [Line Items]                  
Shares issued upon conversion of each $1000 principal amount | shares 43.8481                
Debt instrument, convertible principal amount used in conversion rate $ 1,000                
Conversion price per share | $ / shares $ 22.81                
Debt instrument convertible, percentage of conversion price 130.00%                
Debt instrument convertible, number of trading days | d 20                
Debt instrument, redemption price percentage 100.00%                
Cap price, per share | $ / shares       $ 32.58          
Cap price per share, premium percentage above last reported sale price       100.00%          
Last reported sale price, per share | $ / shares             $ 16.29    
Convertible Senior Notes | Class A Non-voting Common Stock | Maximum                  
Debt Instrument [Line Items]                  
Conversion price per share | $ / shares       $ 32.58          
Convertible Senior Notes | Class A Non-voting Common Stock | Minimum                  
Debt Instrument [Line Items]                  
Conversion price per share | $ / shares       $ 22.81          
Convertible Senior Notes | Class A Non-voting Common Stock | Scenario One                  
Debt Instrument [Line Items]                  
Debt instrument convertible, percentage of conversion price 130.00%                
Debt instrument convertible, number of trading days | d 20                
Debt instrument convertible, number of consecutive trading days | d 30                
Convertible Senior Notes | Class A Non-voting Common Stock | Scenario Two                  
Debt Instrument [Line Items]                  
Debt instrument, convertible principal amount used in conversion rate $ 1,000                
Debt instrument convertible, number of consecutive trading days | d 10                
Debt instrument, convertible, threshold business days 5 days                
Convertible Senior Notes | Class A Non-voting Common Stock | Scenario Two | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument convertible, percentage of conversion price 98.00%                
Convertible Senior Notes | Initial Placement                  
Debt Instrument [Line Items]                  
Debt instrument, principal amount $ 1,100,000,000                
Convertible Senior Notes | Over-Allotment Option                  
Debt Instrument [Line Items]                  
Debt instrument, principal amount $ 165,000,000,000.0