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Stock-Based Compensation (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) director $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) shares
Unrecognized compensation cost and vesting period |  |  |
Unrecognized compensation costs related to unvested stock-based compensation arrangements | $ | $ 16,100,000 |  |
Weighted-average period for recognition of unrecognized stock-based compensation expense | 2 years 1 month 6 days |  |
Other disclosures |  |  |
Shares issued and committed to issue | shares | 16,700 | 13,400 | 12,600
Shares committed to be issued | shares | 9,300 | 6,900 | 7,400
Shares expected to be settled In cash | shares | 7,400 | 6,500 | 5,200
Stock-based compensation expense recognized in operating expenses | $ | $ (12,503,000) | $ (15,036,000) | $ (11,384,000)
Requisite service period for options to vest | 3 years |  |
Tax benefit of stock-based compensation expense in provision for income taxes | $ | $ 3,133,000 | 3,787,000 | 2,859,000
Share-based Payment Arrangement, Expense, after Tax | $ | 9,370,000 | 11,249,000 | 8,525,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $ | $ 25,565,000 | $ 15,701,000 | 21,921,000
Weighted average grant date, period | 60 days |  |
Vesting period | 4 years |  |
Restricted Stock Units |  |  |
Restricted stock unit activity |  |  |
Outstanding at the beginning of the period (in shares) | shares | 344,000 |  |
Awarded (in shares) | shares | 186,000 |  |
Vested (in shares) | shares | (219,000) |  |
Forfeited (in shares) | shares | (9,000) |  |
Outstanding at the end of the period (in shares) | shares | 302,000 | 344,000 |
Outstanding and expected to vest at the end of the period (in shares) | shares | 351,000 |  |
Weighted-Average Exercise Price |  |  |
Outstanding at the beginning of the period (in dollars per share) | $ / shares | $ 81.33 |  |
Awarded (in dollars per share) | $ / shares | 119.60 |  |
Vested (in dollars per share) | $ / shares | 65.45 |  |
Forfeited (in dollars per share) | $ / shares | 99.29 |  |
Outstanding at the end of the period (in dollars per share) | $ / shares | 102.10 | $ 81.33 |
Outstanding and expected to vest at the end of the period (in dollars per share) | $ / shares | $ 97.86 |  |
Aggregate Intrinsic Value |  |  |
Outstanding at the end of the period (in dollars) | $ | $ 26,745,000 | $ 47,721,000 |
Outstanding and expected to vest at end of the period (in dollars) | $ | $ 31,107,000 |  |
Closing price per share (in dollars per share) | $ / shares | $ 88.66 |  |
Total intrinsic value of awards vested (in dollars) | $ | $ 25,600,000 | $ 15,700,000 | 21,900,000
Weighted-Average Exercise Price |  |  |
Outstanding at the beginning of the period (in dollars per share) | $ / shares | $ 81.33 |  |
Forfeited (in dollars per share) | $ / shares | 99.29 |  |
Outstanding at the end of the period (in dollars per share) | $ / shares | $ 102.10 | $ 81.33 |
Aggregate Intrinsic Value |  |  |
Outstanding at the end of the period (in dollars) | $ | $ 26,745,000 | $ 47,721,000 |
Other disclosures |  |  |
Stock-based compensation expense recognized in operating expenses | $ | $ (655,000) |  |
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) | $ | $ 1,500,000 | $ 1,700,000 | $ 1,200,000
Independent directors | Restricted Stock Units |  |  |
Aggregate Intrinsic Value |  |  |
Number Of Directors | director | 7 |  |
Other disclosures |  |  |
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense | $ | $ 704,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | shares | 6,000 |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares | $ 105.50 |  |
Employees | Restricted Stock Units |  |  |
Restricted stock unit activity |  |  |
Awarded (in shares) | shares | 180,000 |  |
Weighted-Average Exercise Price |  |  |
Awarded (in dollars per share) | $ / shares | $ 120.09 |  |
Other disclosures |  |  |
Vesting period | 4 years |  |

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