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Common Stock Repurchase Program - Accelerated Share Repurchase Agreements (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Sep. 30, 2021 | Jun. 30, 2021
Share Repurchases [Line Items] |  |  |  |  |
Amount paid |  |  | $ 275,036 |  | $ 160,000
May 2018 Repurchase Program |  |  |  |  |
Share Repurchases [Line Items] |  |  |  |  |
Amount paid |  | $ 100,000 |  |  |
Total shares received (in shares) |  |  |  | 171,322 |
Average price per share (in dollars per share) |  |  |  | $ 583.70 |
May 2021 Repurchase Program |  |  |  |  |
Share Repurchases [Line Items] |  |  |  |  |
Amount paid | $ 200,000 | $ 100,000 |  |  |
Total shares received (in shares) | 756,502 |  | 100,000 | 161,707 |
Average price per share (in dollars per share) | $ 264.37 |  | $ 522.61 | $ 618.40 |

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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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