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Note 8 - Other Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Deposit with the IRS (Note 9) |  | $ 88,557 |  | $ 88,557 |  | $ 88,557
Corporate-owned life insurance |  | 85,699 |  | 85,699 |  | 83,248
Securities Loaned, Asset |  | 60,876 |  | 60,876 |  |
Property and equipment | [1],[2] | 88,119 |  | 88,119 |  | 70,665
Accrued investment income |  | 31,390 |  | 31,390 |  | 29,255
Deferred policy acquisition costs |  | 15,816 |  | 15,816 |  | 14,127
Reinsurance recoverables |  | 7,605 |  | 7,605 |  | 7,368
Other |  | 60,954 |  | 60,954 |  | 50,615
Total other assets |  | 439,016 |  | 439,016 |  | 343,835
Property and Equipment, Owned, Accumulated Depreciation |  | 101,700 |  | 101,700 |  | 118,500
Depreciation |  | 4,600 | $ 2,900 | 12,800 | $ 7,600 |
Prepaid reinsurance premium |  | 239,620 |  | 239,620 |  | 229,438
Technology Upgrade Related Costs [Member] |  |  |  |  |  |
Property and equipment |  | 45,000 |  | 45,000 |  | 49,700
Leasehold Improvements [Member] |  |  |  |  |  |
Property and equipment |  | 15,700 |  | 15,700 |  |
Securities Financing Transaction, Fair Value [Member] |  |  |  |  |  |
Securities Loaned, Asset | [3] | $ 60,876 |  | $ 60,876 |  |
Securities Held as Collateral, at Fair Value |  |  |  |  |  | $ 0
[1] | Includes $45.0 million and $49.7 million at September 30, 2017 and December 31, 2016, respectively, related to our technology upgrade project and $15.7 million at September 30, 2017 of leasehold improvements related to our new corporate headquarters.
[2] | Property and equipment at cost, less accumulated depreciation of $101.7 million and $118.5 million at September 30, 2017 and December 31, 2016, respectively. Depreciation expense was $4.6 million and $2.9 million for the three-month periods ended September 30, 2017 and 2016, respectively, and $12.8 million and $7.6 million for the nine-month periods ended September 30, 2017 and 2016, respectively.
[3] | Our securities loaned under securities lending agreements are included at fair value within other assets on our condensed consolidated balance sheets. All of our securities lending agreements are classified as overnight and continuous. None of the amounts are subject to offsetting.

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