Quarterly report pursuant to Section 13 or 15(d)

Debt - Narrative (Details)

v3.10.0.1
Debt - Narrative (Details)
1 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2020
USD ($)
Sep. 30, 2018
USD ($)
$ / shares
shares
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
May 23, 2017
USD ($)
$ / shares
shares
Feb. 29, 2016
USD ($)
Sep. 30, 2018
USD ($)
$ / shares
day
shares
Sep. 30, 2018
USD ($)
$ / shares
day
increase
shares
Sep. 30, 2017
USD ($)
Mar. 12, 2018
USD ($)
Dec. 05, 2017
USD ($)
May 31, 2017
USD ($)
Sep. 30, 2014
USD ($)
Line of Credit Facility [Line Items]                          
Carrying value   $ 309,024,000         $ 309,024,000 $ 309,024,000          
Ratio of indebtedness   3.75         3.75 3.75          
Covenant, interest coverage ratio   3.00         3.00 3.00          
Proceeds from borrowings on convertible notes               $ 0 $ 345,000,000        
Convertible notes, net   $ 0   $ 281,199,000     $ 0 0          
Common stock warrants (in shares) | shares         8,200,000                
Purchases of convertible note hedges         $ 62,500,000                
Proceeds from issuance of warrants         $ 31,500,000     $ 0 $ 31,499,000        
Warrants strike price (in dollars per share) | $ / shares         $ 57.58                
Number of warrants exercised (in shares) | shares   0         0 0          
Maximum                          
Line of Credit Facility [Line Items]                          
Common stock warrants (in shares) | shares         8,200,000                
Revolving Facility                          
Line of Credit Facility [Line Items]                          
Line of credit facility, maximum borrowing capacity   $ 350,000,000         $ 350,000,000 $ 350,000,000          
Line of credit facility, additional borrowing capacity   150,000,000         150,000,000 150,000,000   $ 150,000,000      
Debt issuance costs                   $ 1,100,000      
Revolving line of credit outstanding borrowings   0   50,000,000     0 0          
Revolving line of credit facility, available borrowing capacity   350,000,000         350,000,000 350,000,000          
Unamortized debt issuance costs   $ (1,400,000)   (600,000)     $ (1,400,000) $ (1,400,000)          
Revolving Facility | Maximum                          
Line of Credit Facility [Line Items]                          
Ratio of indebtedness   3.5         3.5 3.5          
Revolving Facility | LIBOR                          
Line of Credit Facility [Line Items]                          
Basis spread on interest rate               1.00%          
Revolving Facility | LIBOR | Minimum                          
Line of Credit Facility [Line Items]                          
Basis spread on interest rate               1.25%          
Revolving Facility | LIBOR | Maximum                          
Line of Credit Facility [Line Items]                          
Basis spread on interest rate               2.25%          
Revolving Facility | Federal Funds Rate                          
Line of Credit Facility [Line Items]                          
Basis spread on interest rate               0.50%          
Revolving Facility | Base Rate | Minimum                          
Line of Credit Facility [Line Items]                          
Basis spread on interest rate               0.25%          
Revolving Facility | Base Rate | Maximum                          
Line of Credit Facility [Line Items]                          
Basis spread on interest rate               1.25%          
Letters of credit                          
Line of Credit Facility [Line Items]                          
Line of credit facility, maximum borrowing capacity                         $ 350,000,000
Sub limit for issuance of letters of credit                         10,000,000
Swingline Loan                          
Line of Credit Facility [Line Items]                          
Sub limit for issuance of letters of credit                         $ 20,000,000
Convertible Senior Notes                          
Line of Credit Facility [Line Items]                          
Proceeds from borrowings on convertible notes         $ 304,200,000                
Delayed Draw Term Loan                          
Line of Credit Facility [Line Items]                          
Periodic payment     $ 1,500,000     $ 800,000              
Delayed Draw Term Loan | Line of Credit                          
Line of Credit Facility [Line Items]                          
Line of credit facility, maximum borrowing capacity           $ 125,000,000              
Delayed Draw Term Loan | Line of Credit | Base Rate                          
Line of Credit Facility [Line Items]                          
Ratio of indebtedness   5.0         5.0 5.0          
Delayed Draw Term Loan | Term Loan                          
Line of Credit Facility [Line Items]                          
Carrying value   $ 191,448,000   197,439,000     $ 191,448,000 $ 191,448,000     $ 200,000,000    
Periodic principal payment     $ 2,500,000 1,300,000                  
Seventh Amendment                          
Line of Credit Facility [Line Items]                          
Ratio of indebtedness   4.25         4.25 4.25          
Seventh Amendment | Line of Credit | Base Rate                          
Line of Credit Facility [Line Items]                          
Ratio of indebtedness   5.50         5.50 5.50          
Debt covenant consolidated net leverage ratio number of times allowable increase allowed over consecutive 24 month period | increase               1          
Debt covenant measurement period               24 months          
Seventh Amendment | Convertible Debt                          
Line of Credit Facility [Line Items]                          
Principal amount   $ 150,000,000         $ 150,000,000 $ 150,000,000          
Debt covenant measurement period               24 months          
Debt covenant, acquisition floor for one time leverage extension   150,000,000         150,000,000 $ 150,000,000          
Debt covenant consolidated senior secured net leverage ratio number of times allowable increase allowed over consecutive 24 month period | increase               1          
Convertible Senior Notes Due November 2022 | Convertible Senior Notes                          
Line of Credit Facility [Line Items]                          
Debt issuance costs                       $ 9,800,000  
Principal amount   $ 345,000,000   345,000,000 $ 345,000,000   $ 345,000,000 $ 345,000,000          
Interest rate stated percentage         1.50%                
Effective interest rate of the liability component   5.87%         5.87% 5.87% 5.87%        
Conversion rate, convertible notes               0.02384          
Conversion price (in dollars per share) | $ / shares         $ 41.95                
Long-term debt fair value   $ 197,000,000                      
Threshold trading days | day             20 20          
Threshold consecutive trading days | day             30 30          
Measurement period threshold trading days | day               5          
Measurement period threshold consecutive trading days | day               5          
Redemption price (percentage)               100.00%          
Convertible notes, net   289,868,000   281,199,000     $ 289,868,000 $ 289,868,000       282,500,000  
Carrying amount of convertible debt equity component   $ 61,390,000   61,390,000     $ 61,390,000 $ 61,390,000       $ 62,500,000  
Convertible Senior Notes Due November 2022 | Convertible Senior Notes | Minimum                          
Line of Credit Facility [Line Items]                          
Threshold percentage of stock price trigger             130.00% 130.00%          
Ratio of trading price per $1000 principle amount               98.00%          
Percentage of debt held by individual owner               25.00%          
Over-Allotment Option | Convertible Senior Notes                          
Line of Credit Facility [Line Items]                          
Principal amount         $ 45,000,000                
Scenario, Forecast | Delayed Draw Term Loan                          
Line of Credit Facility [Line Items]                          
Periodic payment $ 3,100,000                        
Scenario, Forecast | Delayed Draw Term Loan | Term Loan                          
Line of Credit Facility [Line Items]                          
Periodic principal payment $ 5,000,000                        
Share Price | Convertible Senior Notes Due November 2022 | Convertible Senior Notes                          
Line of Credit Facility [Line Items]                          
Debt instrument measurement input | $ / shares   65.90         65.90 65.90          
Non recurring | Carrying Value                          
Line of Credit Facility [Line Items]                          
Convertible debt fair value   $ 289,868,000   $ 281,199,000     $ 289,868,000 $ 289,868,000