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Stock-Based Compensation (Details)
 12 Months Ended
Dec. 31, 2023
USD ($)
director
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
shares
Unrecognized compensation cost and vesting period      
Unrecognized compensation costs related to unvested stock-based compensation arrangements | $ $ 22,600,000    
Weighted-average period for recognition of unrecognized stock-based compensation expense 2 years 2 months 12 days    
Other disclosures      
Shares issued and committed to issue | shares 14,700 16,700 13,400
Shares committed to be issued | shares 9,800 9,300 6,900
Shares expected to be settled In cash | shares 4,900 7,400 6,500
Stock-based compensation expense recognized in operating expenses | $ $ (19,726,000) $ (12,503,000) $ (15,036,000)
Requisite service period for options to vest 3 years    
Tax benefit of stock-based compensation expense in provision for income taxes | $ $ 4,808,000 3,133,000 3,787,000
Share-based Payment Arrangement, Expense, after Tax | $ $ 14,918,000 $ 9,370,000 11,249,000
Weighted average grant date, period 60 days    
Restricted Stock Units      
Restricted stock unit activity      
Outstanding at the beginning of the period (in shares) | shares 302,000    
Awarded (in shares) | shares 284,000    
Vested (in shares) | shares (180,000)    
Forfeited (in shares) | shares (28,000)    
Outstanding at the end of the period (in shares) | shares 378,000 302,000  
Outstanding and expected to vest at the end of the period (in shares) | shares 421,000    
Weighted-Average Exercise Price      
Outstanding at the beginning of the period (in dollars per share) | $ / shares $ 102.10    
Awarded (in dollars per share) | $ / shares 99.35    
Vested (in dollars per share) | $ / shares 90.39    
Forfeited (in dollars per share) | $ / shares 107.67    
Outstanding at the end of the period (in dollars per share) | $ / shares 102.87 $ 102.10  
Outstanding and expected to vest at the end of the period (in dollars per share) | $ / shares $ 102.04    
Aggregate Intrinsic Value      
Outstanding at the end of the period (in dollars) | $ $ 74,850,000 $ 26,745,000  
Outstanding and expected to vest at end of the period (in dollars) | $ $ 83,350,000    
Closing price per share (in dollars per share) | $ / shares $ 197.98    
Total intrinsic value of awards vested (in dollars) | $ $ 20,300,000 $ 25,600,000 15,700,000
Weighted-Average Exercise Price      
Outstanding at the beginning of the period (in dollars per share) | $ / shares $ 102.10    
Forfeited (in dollars per share) | $ / shares 107.67    
Outstanding at the end of the period (in dollars per share) | $ / shares $ 102.87 $ 102.10  
Aggregate Intrinsic Value      
Outstanding at the end of the period (in dollars) | $ $ 74,850,000 $ 26,745,000  
Other disclosures      
Stock-based compensation expense recognized in operating expenses | $ $ (1,200,000)    
Phantom Share Units (PSUs)      
Other disclosures      
Vesting period 3 years    
2011 Plan | Non-Qualified Stock Options      
Stock-Based Compensation      
Maximum common stock shares that may be issued under plan | shares 16,300,000    
Stock Bonus Plan | Restricted Stock Units      
Aggregate Intrinsic Value      
Total intrinsic value of awards vested (in dollars) | $ $ 1,900,000 $ 1,500,000 $ 1,700,000
Independent directors | Restricted Stock Units      
Aggregate Intrinsic Value      
Number Of Directors | director 9    
Other disclosures      
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense | $ $ 1,100,000    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | shares 10,000    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares $ 122.50    
Employees | Restricted Stock Units      
Restricted stock unit activity      
Awarded (in shares) | shares 274,000    
Weighted-Average Exercise Price      
Awarded (in dollars per share) | $ / shares $ 99.35    
Other disclosures      
Vesting period 4 years