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Variable Interest Entities and Noncontrolling Interests - Variable interest entity (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 02, 2019 | Mar. 31, 2014 | Sep. 30, 2020 | Sep. 30, 2019
Variable Interest Entity [Line Items] |  |  |  |
Net cash provided by (used for) operating activities |  |  | $ 2,331,450 | $ 1,543,139
Net cash provided by (used for) investing activities |  |  | (2,608,418) | (1,250,476)
Net cash (used for) provided by financing activities |  |  | $ 566,090 | (46,496)
Variable Interest Entity, Primary Beneficiary | Watford Holdings Ltd |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Initial investment contribution amount |  | $ 100,000 |  |
Number of shares acquired |  | 2,500,000 |  |
Ownership percentage |  | 11.00% | 13.00% |
Senior notes, face amount | $ 175,000 |  |  |
Senior notes, stated percentage | 6.50% |  |  |
Proceeds from issuance of senior notes | $ 172,400 |  |  |
Senior notes acquired | $ 35,000 |  |  |
Net cash provided by (used for) operating activities |  |  | $ 133,600 | 177,200
Net cash provided by (used for) investing activities |  |  | 242,000 | (181,200)
Net cash (used for) provided by financing activities |  |  | $ (279,700) | $ 22,200

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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 + Details
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- Definition The cash outflow associated with the acquisition of a controlling interest in another entity or an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash outflow to acquire an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among myriad other features and characteristics. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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