Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Activity (Details)

v3.22.2.2
Share-Based Compensation - Activity (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Feb. 15, 2022
Feb. 16, 2021
Feb. 17, 2020
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Mar. 31, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Restricted Stock Awards, Number of Shares                      
Granted (in shares)                 0    
Stock Options, Number of Shares                      
Converted/Exercised (in shares)         (7,111) (5,835) (12,269) (51,915)      
Stock options, additional disclosures                      
Weighted average remaining contractual term for vested stock options                 5 years 6 months    
Unrecognized share-based compensation expense                      
Total unrecognized compensation expense related to unvested awards $ 15,880,000       $ 15,880,000       $ 15,880,000    
Restricted Stock Awards                      
Restricted Stock Awards, Number of Shares                      
Balance at beginning of period (in shares)             244,400   244,400    
Granted (in shares)                 105,800    
Converted/Exercised (in shares)                 (168,100)    
Forfeited/Expired (in shares)                 (10,600)    
Balance at end of period (in shares) 171,500       171,500       171,500    
Restricted Stock Awards, Weighted Average Grant Date Fair Value Per Share                      
Balance at beginning of period (in dollars per share)             $ 119.41   $ 119.41    
Granted (in dollars per share)                 177.36    
Converted/Exercised (in dollars per share)                 75.65    
Forfeited/Expired (in dollars per share)                 223.63    
Balance at end of period (in dollars per share) $ 194.71       $ 194.71       $ 194.71    
Unrecognized share-based compensation expense                      
RSAs, Unrecognized Compensation Expense on Unvested Awards $ 15,203,000       $ 15,203,000       $ 15,203,000    
Weighted Average Remaining Compensation Expense Period 1 year                    
Assumptions used to estimate the fair values of the awards granted:                      
Measurement period (years)                 2 years 10 months 13 days 2 years 10 months 13 days  
Risk free interest rate (as a percent)                 1.76% 0.22%  
Dividend yield (as a percent)                 0.00% 0.00%  
Estimated fair value of market-based RSAs at grant date (in dollars per share)                 $ 298.20 $ 298.66  
Restricted Stock Awards | Performance-based conditions                      
Restricted stock awards, additional disclosures                      
Grant date fair value   $ 3,411,000 $ 2,374,000 $ 2,526,000              
Restricted Stock Awards | Performance-based conditions | Payout Range-0%                      
Restricted stock awards, additional disclosures                      
Payout range (as a percent)   0.00% 0.00% 0.00%              
Related expenses   $ 0 $ 0 $ 0              
Restricted Stock Awards | Performance-based conditions | Payout Range-25%                      
Restricted stock awards, additional disclosures                      
Payout range (as a percent)   25.00% 25.00% 25.00%              
Related expenses   $ 853,000 $ 594,000 $ 632,000              
Restricted Stock Awards | Performance-based conditions | Payout Range-100%                      
Restricted stock awards, additional disclosures                      
Payout range (as a percent)   100.00% 100.00% 100.00%              
Related expenses   $ 3,411,000 $ 2,374,000 $ 2,526,000              
Restricted Stock Awards | Performance-based conditions | Payout Range-200%                      
Restricted stock awards, additional disclosures                      
Payout range (as a percent)   200.00% 200.00% 200.00%              
Related expenses   $ 6,822,000 $ 4,748,000 $ 5,052,000              
RSAs granted February 18, 2019 | Performance-based conditions                      
Restricted stock awards, additional disclosures                      
Cumulative period of achievement             3 years        
Cumulative achievement percentage             200.00%        
Total compensation expense recognized over the performance period, net of forfeitures             $ 4,400,000        
Stock Options                      
Stock Options, Number of Shares                      
Balance at beginning of period (in shares)             210,500   210,500    
Converted/Exercised (in shares)                 (25,200)    
Forfeited/Expired (in shares)                 (3,100)    
Balance at end of period (in shares) 182,200       182,200       182,200    
Stock Options, Weighted Average Grant Date Fair Value Per Share                      
Balance at beginning of period (in dollars per share)             $ 32.35   $ 32.35    
Converted/Exercised (in dollars per share)                 27.92    
Forfeited/Expired (in dollars per share)                 68.81    
Balance at end of period (in dollars per share) $ 32.25       $ 32.25       32.25    
Stock Options, Weighted Average Exercise Price Per Share                      
Balance at beginning of period (in dollars per share)             $ 87.30   87.30    
Converted/Exercised (in dollars per share)                 80.40    
Forfeited/Expired (in dollars per share)                 174.76    
Balance at end of period (in dollars per share) $ 86.79       $ 86.79       $ 86.79    
Stock options, additional disclosures                      
Aggregate intrinsic value $ 15,317,800       $ 15,317,800       $ 15,317,800   $ 39,692,400
Converted/Exercised aggregate intrinsic value                 $ 3,183,000.0    
Exercisable, Number of shares 148,400       148,400       148,400    
Exercisable, Weighted Average Grant Date Fair Value Per Share                 $ 25.71    
Exercisable Weighted Average Exercise Price Per Share $ 69.94       $ 69.94       $ 69.94    
Exercisable, Aggregate Intrinsic Value $ 14,443,400       $ 14,443,400       $ 14,443,400    
Unrecognized share-based compensation expense                      
Stock options, Unrecognized Compensation Expense on Unvested Awards $ 677,000       $ 677,000       $ 677,000    
Weighted Average Remaining Compensation Expense Period 8 months 12 days                    
Assumptions used to estimate the fair values of the awards granted:                      
Risk free interest rate (as a percent)                 0.76%    
Expected volatility using historical return volatility and implied volatility (as a percent)                 43.29%    
Expected life (in years)                 6 years    
Dividend yield (as a percent)                 0.00%    
Estimated fair value of market-based RSAs at grant date (in dollars per share)                 $ 89.59