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Note 5 - Investments Contractual Maturities (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Available-for-sale Securities, Amortized Cost |  |  |  |  |
Fixed-maturities available for sale—at amortized cost |  | $ 4,804,453 |  | $ 4,549,534 |
Available-for-sale Securities, Fair Value |  |  |  |  |
Loaned securities |  | 16,332 |  | 66,442 |
Fixed-maturity investments available for sale, Total, Fair Value |  | 5,070,091 |  | 4,688,911 |
Non asset-backed securities |  |  |  |  |
Available-for-sale Securities, Amortized Cost |  |  |  |  |
Due in one year or less | [1] | 92,098 |  |  |
Due after one year through five years | [1] | 871,081 |  |  |
Due after five years through ten years | [1] | 1,134,440 |  |  |
Due after ten years | [1] | 595,111 |  |  |
Available-for-sale Securities, Fair Value |  |  |  |  |
Due in one year or less | [1] | 92,628 |  |  |
Due after one year through five years | [1] | 915,497 |  |  |
Due after five years through ten years | [1] | 1,234,602 |  |  |
Due after ten years | [1] | 669,348 |  |  |
Asset-backed and other Mortgage Backed securities |  |  |  |  |
Available-for-sale Securities, Amortized Cost |  |  |  |  |
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Amortized Cost | [2] | 2,113,718 |  |  |
Available-for-sale Securities, Fair Value |  |  |  |  |
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Fair Value | [2] | 2,160,135 |  |  |
Total fixed-maturities available for sale |  |  |  |  |
Available-for-sale Securities, Amortized Cost |  |  |  |  |
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities |  | 4,806,448 |  |  |
Available-for-sale Securities, Fair Value |  |  |  |  |
Available-for-sale Securities, Debt Securities, Including Loaned Securities |  | 5,072,210 |  |  |
Securities Financing Transaction, Fair Value | Corporate bonds and notes | Fair Value, Measurements, Recurring |  |  |  |  |
Available-for-sale Securities, Amortized Cost |  |  |  |  |
Securities Loaned, Asset, Amortized Cost Basis |  | 1,995 |  | 23,853 |
Available-for-sale Securities, Fair Value |  |  |  |  |
Loaned securities |  | 2,119 | [3] | 3,669 | [4]
Fixed-maturities available for sale | Total fixed-maturities available for sale |  |  |  |  |
Available-for-sale Securities, Amortized Cost |  |  |  |  |
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities |  | 4,806,448 |  | 4,573,387 |
Fixed-maturities available for sale—at amortized cost |  | 4,804,453 |  | 4,549,534 |
Available-for-sale Securities, Fair Value |  |  |  |  |
Available-for-sale Securities, Debt Securities, Including Loaned Securities |  | 5,072,210 |  | 4,712,924 |
Fixed-maturity investments available for sale, Total, Fair Value |  | 5,070,091 |  | 4,688,911 |
Fixed-maturities available for sale | Corporate bonds and notes |  |  |  |  |
Available-for-sale Securities, Amortized Cost |  |  |  |  |
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities |  | 2,455,572 |  | 2,136,819 |
Available-for-sale Securities, Fair Value |  |  |  |  |
Available-for-sale Securities, Debt Securities, Including Loaned Securities |  | $ 2,650,575 |  | 2,241,280 |
Fixed-maturities available for sale | Securities Financing Transaction, Fair Value | Corporate bonds and notes |  |  |  |  |
Available-for-sale Securities, Fair Value |  |  |  |  |
Loaned securities |  |  |  | $ 24,013 |
[1] | Actual maturities may differ as a result of calls before scheduled maturity.
[2] | Includes RMBS, CMBS and Other ABS, which are not due at a single maturity date.
[3] | Securities loaned to third-party borrowers under securities lending agreements are classified as other assets in our condensed consolidated balance sheets. See Note 5 for more information.
[4] | Securities loaned to third-party borrowers under securities lending agreements are classified as other assets in our condensed consolidated balance sheets. See Note 5 for more information.

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