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Debt - Credit Agreement (Details) - USD ($) |  |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 18, 2020 | Apr. 24, 2020 | Feb. 12, 2016 | Sep. 27, 2020 | Apr. 23, 2020 | Jun. 18, 2010
Revolving credit facility |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Unused and available credit under the credit agreement |  |  |  | $ 533,800,000 |  |
Stand-by letters of credit outstanding |  |  |  | $ 16,200,000 |  |
Letters of credit |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Term of debt |  |  |  | 1 year |  |
Stand-by letters of credit outstanding |  |  |  | $ 16,200,000 |  |
Credit Agreement |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Borrowing capacity |  | $ 100,000,000 |  |  |  |
Term of debt |  |  | 5 years |  |  |
Sublimit on letters of credit |  |  | $ 100,000,000 |  |  |
Eurocurrency rate loans | LIBOR |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Minimum base rate (as a percent) |  | $ 1.00 |  |  |  |
Eurocurrency rate loans | LIBOR | Minimum |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Interest rate added to base rate (as a percent) |  | 1.50% |  |  |  |
Eurocurrency rate loans | LIBOR | Maximum |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Interest rate added to base rate (as a percent) |  | 2.10% |  |  |  |
Base rate loans and swing line loans |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Minimum base rate (as a percent) |  | $ 2.00 |  |  |  |
Base rate loans and swing line loans | LIBOR |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Interest rate (as a percent) |  | 1.00% |  |  |  |
Base rate loans and swing line loans | Prime Rate |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Interest rate (as a percent) |  | 0.50% |  |  |  |
Revolving credit facility |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Borrowing capacity |  | $ 800,000,000 | $ 500,000,000 |  | $ 500,000,000 |
Extension period |  | 1 year |  |  |  |
Interest rate on revolving credit facility (as a percent) |  |  |  | 2.50% |  |
Amount drawn |  |  |  | $ 250,000,000.0 |  |
Term loan facility | Term Loan due February 2021 |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Term of debt |  |  | 5 years |  |  |
Face amount |  |  | $ 300,000,000 |  |  |
Amount drawn |  |  |  | $ 300,000,000 |  |
Notes Purchase Agreement 2010 | Revolving credit facility |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Repayment of debt | $ 35,000,000.0 |  |  |  |  |
Notes Purchase Agreement 2010 | Senior notes |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Face amount |  |  |  |  |  | $ 75,000,000.0
Amount drawn | $ 40,000,000.0 |  |  |  |  |
Swing Line Loans |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |
Borrowing capacity |  | $ 15,000,000 |  |  |  |

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 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=119993939&loc=d3e28551-108399 Reference 3: 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=120391452&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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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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