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Long-Term Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Schedule of Long-Term Debt | Long-term debt at December 31, 2020 and 2019 consisted of the following:
(in thousands) |  | December 31, 2020 |  |  | December 31, 2019 |
Current portion of long-term debt: |  |  |  |  |  |  |  |
Current portion of 5-year term loan facility expires 2022 |  | $ | 40,000 |  |  | $ | 40,000 |
Current portion of 5-year term loan credit agreement expires 2023 |  |  | 30,000 |  |  |  | 15,000 |
Total current portion of long-term debt |  |  | 70,000 |  |  |  | 55,000 |
Long-term debt: |  |  |  |  |  |  |  |
Note agreements: |  |  |  |  |  |  |  |
4.200% Senior Notes, semi-annual interest payments, balloon due 2024 |  |  | 499,416 |  |  |  | 499,259 |
4.500% Senior Notes, semi-annual interest payments, balloon due 2029 |  |  | 349,540 |  |  |  | 349,484 |
2.375% Senior Note due 2031, semi-annual interest payments, balloon due 2031 |  |  | 699,252 |  |  |  | — |
Total notes |  |  | 1,548,208 |  |  |  | 848,743 |
Credit agreements: |  |  |  |  |  |  |  |
5-year term loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires June 28, 2022 |  |  | 250,000 |  |  |  | 290,000 |
5-year revolving loan facility, periodic interest payments, currently LIBOR plus up to 1.500%, plus commitment fees up to 0.250%, expires June 28, 2022 |  |  | — |  |  |  | 100,000 |
5-year term loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires December 21, 2023 |  |  | 240,000 |  |  |  | 270,000 |
Total credit agreements |  |  | 490,000 |  |  |  | 660,000 |
Debt issuance costs (contra) |  |  | (12,302 | ) |  |  | (8,400 | )
Total long-term debt less unamortized discount and debt issuance costs |  |  | 2,025,906 |  |  |  | 1,500,343 |
Current portion of long-term debt |  |  | 70,000 |  |  |  | 55,000 |
Total debt |  | $ | 2,095,906 |  |  | $ | 1,555,343 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + 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) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 5: 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 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 9: 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 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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