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Debt - Narrative (Details) - Senior Notes - USD ($) | Oct. 09, 2020 | Nov. 30, 2020
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Debt Instrument [Line Items] |  |
Debt instrument, face amount | $ 150,000,000.0 |
2.77% Coupon, 7 Year Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, face amount | $ 70,000,000.0 |
Debt instrument, term | 7 years |
Interest rate stated percentage | 2.77% |
3.17% Coupon, 12 Year Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, face amount | $ 80,000,000.0 |
Debt instrument, term | 12 years |
Interest rate stated percentage | 3.17% |
Unsecured Senior Notes Due January 2021 |  |
Debt Instrument [Line Items] |  |
Interest rate stated percentage |  | 5.42%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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