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Stock-Based Compensation - Summary of Restricted Stock Unit and Performance Share Transaction (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restricted Stock Units |  |  |
Units/Shares Activity |  |  |
Outstanding as of beginning period (in shares) | 705,136 |  |
Granted (in shares) | 168,811 |  |
Distributed (vested) (in shares) | (220,122) |  |
Cancelled (in shares) | (37,241) |  |
Outstanding as of end of period (in shares) | 616,584 | 705,136 |
Vested or expected to vest (in shares) | 616,584 |  |
Weighted Average Grant Date Fair Value |  |  |
Outstanding as of beginning of period (in dollars per share) | $ 128.71 |  |
Granted (in dollars per share) | 129.40 | $ 134.65 | $ 168.86
Outstanding as of end of period (in dollars per share) | $ 124.83 | $ 128.71 |
Performance Shares |  |  |
Units/Shares Activity |  |  |
Outstanding as of beginning period (in shares) | 849,544 |  |
Granted (in shares) | 346,317 |  |
Distributed (vested) (in shares) | (129,920) |  |
Cancelled (in shares) | (256,470) |  |
Outstanding as of end of period (in shares) | 809,471 | 849,544 |
Vested or expected to vest (in shares) | 299,390 |  |
Weighted Average Grant Date Fair Value |  |  |
Outstanding as of beginning of period (in dollars per share) | $ 140.83 |  |
Granted (in dollars per share) | 147.53 | $ 124.48 | $ 179.40
Outstanding as of end of period (in dollars per share) | $ 143.48 | $ 140.83 |
Stock Options |  |  |
Units/Shares Activity |  |  |
Outstanding as of beginning period (in shares) | 0 |  |
Granted (in shares) | 108,446 |  |
Distributed (vested) (in shares) | 0 |  |
Cancelled (in shares) | 0 |  |
Outstanding as of end of period (in shares) | 108,446 | 0 |
Vested or expected to vest (in shares) | 108,446 |  |
Weighted Average Grant Date Fair Value |  |  |
Granted (in dollars per share) | $ 30.32 |  |
Outstanding as of end of period (in dollars per share) | $ 30.32 |  |

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- Definition Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Expected to Vest Outstanding Number + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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