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Note 5 - Investments Contractual Maturities (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Available-for-sale Securities, Amortized Cost |  |  |
Fixed-maturities available for sale—at amortized cost |  | $ 4,564,616 | $ 4,549,534
Available-for-sale Securities, Fair Value |  |  |
Loaned securities |  | 47,520 | 66,442
Fixed-maturity investments available for sale, Total, Fair Value |  | 4,603,613 | 4,688,911
Non asset-backed securities |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Due in one year or less | [1] | 105,520 |
Due after one year through five years | [1] | 823,582 |
Due after five years through ten years | [1] | 1,082,394 |
Due after ten years | [1] | 493,353 |
Available-for-sale Securities, Fair Value |  |  |
Due in one year or less | [1] | 104,855 |
Due after one year through five years | [1] | 829,134 |
Due after five years through ten years | [1] | 1,089,685 |
Due after ten years | [1] | 526,338 |
RMBS |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Amortized Cost | [2] | 747,271 |
Available-for-sale Securities, Fair Value |  |  |
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Fair Value | [2] | 779,590 |
CMBS |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Amortized Cost | [2] | 609,518 |
Available-for-sale Securities, Fair Value |  |  |
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Fair Value | [2] | 610,877 |
Other ABS |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Amortized Cost | [2] | 708,357 |
Available-for-sale Securities, Fair Value |  |  |
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Fair Value | [2] | 666,918 |
Total fixed-maturities available for sale |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities |  | 4,569,995 |
Available-for-sale Securities, Fair Value |  |  |
Available-for-sale Securities, Debt Securities, Including Loaned Securities |  | 4,607,397 |
Fixed-maturities available for sale | RMBS |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities |  | 747,271 | 766,429
Available-for-sale Securities, Fair Value |  |  |
Available-for-sale Securities, Debt Securities, Including Loaned Securities |  | 779,590 | 779,354
Fixed-maturities available for sale | CMBS |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities |  | 609,518 | 593,647
Available-for-sale Securities, Fair Value |  |  |
Available-for-sale Securities, Debt Securities, Including Loaned Securities |  | 610,877 | 608,015
Fixed-maturities available for sale | Other ABS |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities |  | 708,357 | 760,785
Available-for-sale Securities, Fair Value |  |  |
Available-for-sale Securities, Debt Securities, Including Loaned Securities |  | 666,918 | 759,129
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 |  | 4,569,995 | 4,573,387
Fixed-maturities available for sale—at amortized cost |  | 4,564,616 | 4,549,534
Available-for-sale Securities, Fair Value |  |  |
Available-for-sale Securities, Debt Securities, Including Loaned Securities |  | 4,607,397 | 4,712,924
Fixed-maturity investments available for sale, Total, Fair Value |  | 4,603,613 | 4,688,911
Fixed-maturities available for sale | Securities Financing Transaction, Cost | Total fixed-maturities available for sale |  |  |
Available-for-sale Securities, Amortized Cost |  |  |
Securities Loaned, Asset, Amortized Cost Basis |  | 5,379 | 23,853
Fixed-maturities available for sale | Securities Financing Transaction, Fair Value | Total fixed-maturities available for sale |  |  |
Available-for-sale Securities, Fair Value |  |  |
Loaned securities |  | $ 3,784 | $ 24,013
[1] | Actual maturities may differ as a result of calls before scheduled maturity.
[2] | RMBS, CMBS and Other ABS are shown separately, as they are not due at a single maturity date.

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