Note 9 - Other Assets Schedule of Other Assets (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Qualified Deposit With The U.S. Department Of Treasury Relating To Prior Examinations		$ 88,557
Deposit with the IRS (Note 14)			$ 88,557
Life Insurance, Corporate or Bank Owned, Amount		85,862	83,248
Property and Equipment, Owned, Net	[1],[2]	87,042	70,665
Securities Loaned, Asset		27,964
Accrued investment income		31,389	29,255
Deferred policy acquisition costs		16,987	14,127
Reinsurance recoverables		8,492	7,368
Other Assets, Miscellaneous		61,556	50,615
Other assets		407,849	343,835
Property and Equipment, Owned, Accumulated Depreciation		106,000	118,500
Depreciation		17,400	11,700	$ 6,700
Technology Upgrade Related Costs [Member]
Property and Equipment, Owned, Net		44,000	49,700
Leasehold Improvements [Member]
Property and Equipment, Owned, Net		15,500
Securities Financing Transaction, Fair Value [Member]
Securities Loaned, Asset	[3]	$ 27,964
Securities Held as Collateral, at Fair Value			$ 0

[1] Includes $44.0 million and $49.7 million at December 31, 2017 and 2016, respectively, related to our technology upgrade project and $15.5 million at December 31, 2017 of leasehold improvements related to our new corporate headquarters.

[2] Property and equipment at cost, less accumulated depreciation of $106.0 million and $118.5 million at December 31, 2017 and 2016, respectively. Depreciation expense was $17.4 million, $11.7 million and $6.7 million for the years ended December 31, 2017, 2016 and 2015 respectively.

[3] Our securities loaned under securities lending agreements are included at fair value within other assets on our consolidated balance sheets. All of our securities lending agreements are classified as overnight and revolving. None of the amounts are subject to offsetting.