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Note 5 - Investments Available for Sale Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged |  | $ 114,600 |  | $ 88,400 |
Loaned securities |  | 22,606 |  | 27,860 |
Securities Financing Transaction, Fair Value |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Loaned securities | [1] | 22,606 |  | 27,860 |
Securities Financing Transaction, Fair Value | US government and agency securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Loaned securities | [1] | 0 |  | 9,987 |
Securities Financing Transaction, Fair Value | Corporate bonds and notes |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Loaned securities | [1] | 6,526 |  | 7,818 |
Fixed maturities | US government and agency securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Available for Sale Securities, Amortized Cost |  | 94,441 |  | 85,532 |
Available for Sale Securities, Fair Value |  | 94,098 | [2] | 84,070 | [3]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax |  | 185 |  | 46 |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax |  | 528 |  | 1,508 |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged |  | 10,900 |  | 10,700 |
Fixed maturities | State and municipal obligations |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Available for Sale Securities, Amortized Cost |  | 88,598 |  | 138,022 |
Available for Sale Securities, Fair Value |  | 92,718 |  | 138,313 |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax |  | 4,421 |  | 2,191 |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax |  | 301 |  | 1,900 |
Fixed maturities | Corporate bonds and notes |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Available for Sale Securities, Amortized Cost |  | 2,159,040 |  | 2,288,720 |
Available for Sale Securities, Fair Value |  | 2,175,975 |  | 2,229,885 |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax |  | 31,450 |  | 5,053 |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax |  | 14,515 |  | 63,888 |
Fixed maturities | RMBS |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Available for Sale Securities, Amortized Cost |  | 348,746 |  | 334,843 |
Available for Sale Securities, Fair Value |  | 350,238 | [4] | 332,142 | [5]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax |  | 4,242 |  | 1,785 |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax |  | 2,750 |  | 4,486 |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged |  | 103,700 |  | 77,700 |
Fixed maturities | CMBS |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Available for Sale Securities, Amortized Cost |  | 512,190 |  | 546,729 |
Available for Sale Securities, Fair Value |  | 515,604 |  | 539,915 |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax |  | 4,873 |  | 544 |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax |  | 1,459 |  | 7,358 |
Fixed maturities | Other ABS |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Available for Sale Securities, Amortized Cost |  | 679,444 |  | 712,748 |
Available for Sale Securities, Fair Value |  | 675,477 |  | 704,662 |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax |  | 1,021 |  | 814 |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax |  | 4,988 |  | 8,900 |
Fixed maturities | Total fixed-maturities available for sale |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Available for Sale Securities, Amortized Cost |  | 3,882,459 |  | 4,106,594 |
Available for Sale Securities, Fair Value |  | 3,904,110 | [6] | 4,028,987 | [7]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax |  | 46,192 |  | 10,433 |
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax |  | 24,541 |  | 88,040 |
Fixed maturities | Securities Financing Transaction, Fair Value |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Loaned securities |  | $ 6,500 |  | $ 7,400 |
[1] | Our securities loaned under securities lending agreements are reported at fair value within other assets in our condensed consolidated balance sheets. All of our securities lending agreements are classified as overnight and revolving. None of the amounts are subject to offsetting.
[2] | Includes securities with a fair value of $10.9 million serving as collateral for FHLB advances.
[3] | Includes securities with a fair value of $10.7 million serving as collateral for FHLB advances.
[4] | Includes securities with a fair value of $103.7 million serving as collateral for FHLB advances.
[5] | Includes securities with a fair value of $77.7 million serving as collateral for FHLB advances.
[6] | Includes $6.5 million of fixed-maturity securities loaned to third-party Borrowers under securities lending agreements, classified as other assets in our condensed consolidated balance sheets, as further described below.
[7] | Includes $7.4 million of fixed-maturity securities loaned to third-party Borrowers under securities lending agreements, classified as other assets in our condensed consolidated balance sheets, as further described below.

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as 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=82897076&loc=d3e27161-111563 + Details
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- Definition Amount of the collateral pledged in support of federal home loan bank advances outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount of asset associated with securities loaned to entities in exchange for collateral. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226003-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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