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Employee Benefits and Share-Based Compensation - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Aug. 02, 2016 | Nov. 04, 2014
The 2016 Repurchase Program |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Value of shares authorized for repurchase under stock repurchase programs (up to) |  |  |  |  | $ 50,000,000 |
Remaining value of shares authorized for repurchase under stock repurchase programs | $ 2,700,000 |  | $ 2,700,000 |  |  |
2014 Share Repurchase Program |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Value of shares authorized for repurchase under stock repurchase programs (up to) |  |  |  |  |  | $ 50,000,000
2016 and 2014 Share Repurchase Programs |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares repurchased (in shares) | 0 | 0 | 389,300 | 0 |  |
Average price of repurchased shares (in dollars per share) |  |  | $ 134.11 |  |  |
Aggregate purchase price of treasury stock |  |  | $ 52,200,000 |  |  |
1997 Plan | ESPP shares available for future issuance |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares purchased under ESPP (in shares) |  |  | 316,000 | 287,000 |  |
Weighted-average price of shares purchased (in dollars per share) |  |  | $ 67.63 | $ 62.14 |  |
Unrecognized compensation cost | $ 3,900,000 |  | $ 3,900,000 |  |  |
Weighted average period of compensation cost not yet recognized |  |  | 1 year 6 months |  |  |
2009 Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock options granted (in shares) | 0 |  | 0 |  |  |
Weighted-average fair value of options granted (in dollars per share) |  |  |  | $ 33.89 |  |
Intrinsic value of options exercised | $ 7,600,000 | $ 26,000,000 | $ 23,100,000 | $ 56,800,000 |  |
Unrecognized compensation cost of unvested stock options | 20,100,000 |  | $ 20,100,000 |  |  |
2009 Plan | Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average period of compensation cost not yet recognized |  |  | 1 year 7 months 6 days |  |  |
2009 Plan | RSUs |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average period of compensation cost not yet recognized |  |  | 3 years 2 months 12 days |  |  |
Unrecognized compensation cost | 111,100,000 |  | $ 111,100,000 |  |  |
2009 Plan | RSAs |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average period of compensation cost not yet recognized |  |  | 7 months 6 days |  |  |
Unrecognized compensation cost | 800,000 |  | $ 800,000 |  |  |
2009 Plan | PSUs |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average period of compensation cost not yet recognized |  |  | 1 year 2 months 12 days |  |  |
Unrecognized compensation cost | $ 8,800,000 |  | $ 8,800,000 |  |  |

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