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Debt - Narrative (Details) | 1 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 31, 2021 USD ($) | Apr. 30, 2021 debtInstrumentExtensionOption | Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |
Deferred financing costs, net |  |  | $ 29,867,000 |  |  | $ 27,422,000
Senior Notes | 2031 unsecured senior notes |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument face amount | $ 450,000,000 |  |  |  |  |
Interest Rate | 2.375% |  | 2.38% |  |  |
Redemption price (in percent) | 100.00% |  |  |  |  |
Senior Notes | 2051 unsecured senior notes |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument face amount | $ 300,000,000 |  |  |  |  |
Interest Rate | 3.375% |  | 3.38% |  |  |
Redemption price (in percent) | 100.00% |  |  |  |  |
Senior Notes | The Notes |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Proceeds from unsecured senior notes, net of discount | $ 731,600,000 |  |  |  |  |
Underwriting fees | 5,600,000 |  |  |  |  |
Unamortized discount | 12,800,000 |  |  |  |  |
Deferred financing costs, net | $ 1,400,000 |  |  |  |  |
Revolving Credit Facility | Line of Credit |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Interest Rate |  |  | 1.18% |  |  |
Maximum borrowing capacity |  |  | $ 1,250,000,000 | $ 1,250,000,000 | $ 800,000,000 |
Number of extension options | debtInstrumentExtensionOption |  | 2 |  |  |  |
Extension period |  | 6 months |  |  |  |
Revolving Credit Facility | Line of Credit | LIBOR |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  |  | 1.10% |  |  |
Basis spread on base rate |  | 1.00% |  |  |  |
Revolving Credit Facility | Line of Credit | Federal Funds Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Basis spread on base rate |  | 0.50% |  |  |  |
Minimum | Revolving Credit Facility | Line of Credit | LIBOR |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  | 0.725% |  |  |  |
Minimum | Revolving Credit Facility | Line of Credit | Base Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  | 0.00% |  |  |  |
Maximum | Revolving Credit Facility | Line of Credit | LIBOR |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  | 1.45% |  |  |  |
Maximum | Revolving Credit Facility | Line of Credit | Base Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  | 0.45% |  |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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