Income Taxes (Tables)
 9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]    
Summary of Income Tax Expense and Effective Tax Rate
The following table summarizes the Company’s income tax expense and effective tax rate for the three and nine months ended September 30, 2021 and 2020
 
    
For the Three Months
Ended September 30,
    
For the Nine Months
Ended September 30,
  
    
2021
    
2020
    
2021
    
2020
  
                          
    
(dollars in thousands)
    
(dollars in thousands)
  
Income before provision for income taxes
    $ 60,219     $ 43,363     $ 194,828     $ 127,074  
Provision for income taxes
      41,603       25,948       105,254       67,116  
Effective tax rate
      69 %      60 %      54 %      53 % 
 
Schedule of Components of Income Tax Expense (Benefit)  
The components of the income tax provision include:
 
    
Year Ended December 31,
  
    
2020
     
2019
     
2018
  
                      
    
(dollars in thousands)
  
Current
    $ 99,338      $ 51,494      $ 22,697  
Deferred
      (4,887 )       (908 )       (546 ) 
    
 
 
     
 
 
     
 
 
  
     $ 94,451      $ 50,586      $ 22,151  
    
 
 
     
 
 
     
 
 
  
Schedule of Effective Income Tax Rate Reconciliation  
 
    
Year Ended December 31,
  
    
2020
    
2019
    
2018
  
                    
    
(dollars in thousands)
  
Income before income taxes
    $ 157,450     $ 103,680     $ 33,044  
Federal statutory rate
      21.0 %      21.0 %      21.0 % 
    
 
 
    
 
 
    
 
 
  
Theoretical tax expense
      33,064       21,773       6,939  
State taxes
      12,406       9,477       4,366  
Other
      (1,666 )      1,310       1,176  
Tax effect of
non-deductible
expenses:
                         
Nondeductible share based compensation
      —         —         3,154  
Section 280E permanent differences
      50,646       18,026       6,517  
       61,386       28,813       15,212  
    
 
 
    
 
 
    
 
 
  
Tax expense
    $ 94,451     $ 50,586     $ 22,151  
    
 
 
    
 
 
    
 
 
  
Schedule of Deferred Tax Assets and Liabilities  
Deferred income taxes consist of the following at December 31, 2020 and 2019, and 2018:
 
    
Year Ended December 31,
  
    
2020
     
2019
     
2018
  
                      
    
(dollars in thousands)
  
Deferred tax assets
                           
Lease liability
    $ 1,219      $ 1,020      $ —    
Other deferred tax assets
      7,025        969        570  
Deferred tax liabilities
                           
Right of use assets
      (1,210 )       (1,099 )       —    
Intangible assets
      (26,446 )       (6,144 )       (3,080 ) 
Property and equipment
      (3,153 )       (233 )       (534 ) 
Lease payments
      (1,010 )       —          —    
    
 
 
     
 
 
     
 
 
  
Net deferred tax liability
    $ (23,575 )     $ (5,486 )     $ (3,044 )