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Investments - Available-for-sale (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Gross unrealized gains | $ 1,900 | $ 1,200
Gross unrealized losses | (200) | (800)
Interest receivable on securities | 300 | 200
Debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Basis | 422,981 | 273,459
Gross unrealized gains | 1,877 | 1,152
Gross unrealized losses | (226) | (777)
Carrying value (fair value) | 424,632 | 273,834
Beneficial interests in securitization trusts |  |
Debt Securities, Available-for-sale [Line Items] |  |
Basis | 133,484 | 91,418
Gross unrealized gains | 0 | 0
Gross unrealized losses | 0 | 0
Carrying value (fair value) | 133,484 | 91,418
Accumulated net investment gain (loss) attributable to noncontrolling interest |  |
Debt Securities, Available-for-sale [Line Items] |  |
Basis | 556,465 | 364,877
Gross unrealized gains | 1,877 | 1,152
Gross unrealized losses | (226) | (777)
Carrying value (fair value) | $ 558,116 | $ 365,252

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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