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Senior Notes payable and letter of credit facilities (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Schedule of Line of Credit Facilities | As of December 31, 2020, the Company had entered into the following letter of credit facilities:
| Letters of Credit |  | Collateral
| Committed Capacity |  | Issued |  | Cash and Cash Equivalents
Committed - Secured letters of credit facilities | $ | 225,000 |  |  | $ | 99,638 |  |  | $ | 102,283 |
Uncommitted - Secured letters of credit facilities | n/a |  | 203,749 |  |  | 203,749 |
|  |  | $ | 303,387 |  |  | $ | 306,032 |

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + 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 Reference 2: 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 + Details
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