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Convertible Notes, Net (Tables)
 12 Months Ended
Dec. 31, 2021
Text Block [Abstract]  
Summary of Outstanding Convertible Senior Notes
As of December 31, 2021, the following convertible senior notes, or Convertible Notes, were outstanding ($ in thousands):
Convertible Notes IssuanceFace Value
Interest Rate
All-in Cost(1)
Conversion Rate(2)
Maturity
May 2017$402,500 4.38 %4.85 %28.0324May 5, 2022
March 2018$220,000 4.75 %5.33 %27.6052March 15, 2023
(1)Includes issuance costs that are amortized through interest expense over the life of the Convertible Notes using the effective interest method.
(2)Represents the shares of class A common stock per $1,000 principal amount of Convertible Notes, which is equivalent to a conversion price of $35.67 and $36.23 per share of class A common stock, respectively, for the May 2017 and March 2018 convertible notes. The cumulative dividend threshold as defined in the respective May 2017 and March 2018 convertible notes supplemental indentures have not been exceeded as of December 31, 2021.
Summary of Details of Net Book Value of Convertible Note
The following table details the net book value of our Term Loans on our consolidated balance sheets ($ in thousands):
 December 31, 2021December 31, 2020
Face value$1,349,271 $1,062,766 
Unamortized discount(9,209)(9,807)
Deferred financing costs(12,656)(11,255)
Net book value$1,327,406 $1,041,704 
The following table details the net book value of our Convertible Notes on our consolidated balance sheets ($ in thousands):
 December 31, 2021December 31, 2020
Face value$622,500 $622,500 
Unamortized discount(2,472)(5,715)
Deferred financing costs(152)(396)
Net book value$619,876 $616,389 
Summary of Details about Interest Expense
The following table details our interest expense related to the Convertible Notes ($ in thousands):

 Year Ended December 31,
 202120202019
Cash coupon$28,059 $28,059 $28,059 
Discount and issuance cost amortization3,4863,3193,159
Total interest expense$31,545 $31,378 $31,218