Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Activity (Details)

v3.24.2.u1
Share-Based Compensation - Activity (Details) - USD ($)
 3 Months Ended 6 Months Ended
Feb. 21, 2024
Feb. 21, 2023
Feb. 15, 2022
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2023
Stock Options, Number of Shares                      
Converted/Exercised (in shares)       (10,269) (5,757) (4,762) (28,840)        
Stock options, additional disclosures                      
Weighted average remaining contractual term for vested stock options               4 years 8 months 12 days      
Unrecognized share-based compensation expense                      
Total unrecognized compensation expense related to unvested awards       $ 27,675,000       $ 27,675,000      
Restricted Stock Awards                      
Restricted Stock Awards, Number of Shares                      
Balance at beginning of period (in shares)         195,500     195,500      
Granted (in shares)               45,000.0      
Converted/Exercised (in shares)               (52,600)      
Forfeited/Expired (in shares)               (2,700)      
Balance at end of period (in shares)       185,200       185,200      
Restricted Stock Awards, Weighted Average Grant Date Fair Value Per Share                      
Balance at beginning of period (in dollars per share)         $ 223.49     $ 223.49      
Granted (in dollars per share)               419.27      
Converted/Exercised (in dollars per share)               229.41      
Forfeited/Expired (in dollars per share)               281.40      
Balance at end of period (in dollars per share)       $ 268.77       $ 268.77      
Unrecognized share-based compensation expense                      
RSAs, Unrecognized Compensation Expense on Unvested Awards       $ 27,675,000       $ 27,675,000      
Weighted Average Remaining Compensation Expense Period               1 year 1 month 6 days      
Assumptions used to estimate the fair values of the awards granted:                      
Measurement period (years)               2 years 10 months 9 days 2 years 10 months 9 days 2 years 10 months 13 days  
Risk free interest rate (as a percent)               4.36% 4.42% 1.76%  
Dividend yield (as a percent)               0.00% 0.00% 0.00%  
Estimated fair value of market-based RSAs at grant date (in dollars per share)               $ 503.68 $ 270.64 $ 298.20  
Restricted Stock Awards | Performance-based conditions                      
Restricted stock awards, additional disclosures                      
Grant date fair value $ 4,824,000 $ 4,037,000 $ 2,978,000                
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%                
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 $ 1,206,000 $ 1,009,000 $ 745,000                
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 $ 4,824,000 $ 4,037,000 $ 2,978,000                
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 $ 9,648,000 $ 8,074,000 $ 5,956,000                
RSAs granted February 16, 2021 | 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            
Employee Stock Option                      
Stock Options, Number of Shares                      
Balance at beginning of period (in shares)         128,700     128,700      
Converted/Exercised (in shares)               (16,000.0)      
Balance at end of period (in shares)       112,700       112,700      
Stock Options, Weighted Average Grant Date Fair Value Per Share                      
Balance at beginning of period (in dollars per share)         $ 36.65     $ 36.65      
Converted/Exercised (in dollars per share)               82.64      
Balance at end of period (in dollars per share)       $ 30.10       30.10      
Stock Options, Weighted Average Exercise Price Per Share                      
Balance at beginning of period (in dollars per share)         $ 98.58     98.58      
Converted/Exercised (in dollars per share)               201.27      
Balance at end of period (in dollars per share)       $ 83.97       $ 83.97      
Stock options, additional disclosures                      
Aggregate intrinsic value       $ 33,930,300       $ 33,930,300     $ 35,462,800
Converted/Exercised aggregate intrinsic value               $ 3,312,800      
Exercisable, Number of shares       112,700       112,700      
Exercisable, Weighted Average Grant Date Fair Value Per Share               $ 30.10      
Exercisable Weighted Average Exercise Price Per Share       $ 83.97       $ 83.97      
Exercisable, Aggregate Intrinsic Value       $ 33,930,300       $ 33,930,300