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v3.21.1

Debt (Tables) | 3 Months Ended
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Mar. 31, 2021
Debt |
Schedule of debt | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Outstanding | ​ |  |  |  |  |
​ | ​ | principal | ​ | Carrying value |
​ | ​ | March 31, | ​ | March 31, | ​ | December 31, |
​ |  | 2021 |  | 2021 |  | 2020 |
​ |  | amounts in thousands | ​
Margin Loan Facility | ​ | $ | 2,000,000 | ​ |  | 2,000,000 |  | 2,000,000 | ​
2.75% Exchangeable Senior Debentures due 2050 | ​ |  | 575,000 | ​ |  | 588,064 |  | 608,804 | ​
1.25% Exchangeable Senior Debentures due 2050 | ​ | ​ | 825,000 | ​ | ​ | 811,536 | ​ | 836,971 | ​
1.75% Exchangeable Senior Debentures due 2046 | ​ | ​ | 14,536 | ​ | ​ | 24,741 | ​ | 26,350 | ​
Senior notes | ​ |  | 600,000 | ​ |  | 634,697 |  | 635,683 | ​
Senior credit facility | ​ |  | 523,000 | ​ |  | 523,000 |  | 704,000 | ​
Wells Fargo note payable | ​ |  | 6,273 | ​ |  | 6,273 |  | 6,442 | ​
Deferred financing costs | ​ |  | — | ​ |  | (1,714) |  | (2,017) | ​
Total debt | ​ | $ | 4,543,809 | ​ |  | 4,586,597 |  | 4,816,233 | ​
Debt classified as current | ​ |  | ​ | ​ |  | (29,425) |  | (31,026) | ​
Total long-term debt | ​ | ​ | ​ | ​ | $ | 4,557,172 |  | 4,785,207 | ​

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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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