Note 8 - Other Assets (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Deposit with the IRS (Note 9)		$ 88,557		$ 88,557		$ 88,557
Corporate-owned life insurance		84,981		84,981		83,248
Property and equipment	[1],[2]	87,541		87,541		70,665
Accrued investment income		29,348		29,348		29,255
Deferred policy acquisition costs		14,350		14,350		14,127
Reinsurance recoverables		7,523		7,523		7,368
Other		65,055		65,055		50,615
Total other assets		377,355		377,355		343,835
Property and Equipment, Owned, Accumulated Depreciation		126,800		126,800		118,500
Depreciation		4,100	$ 2,400	8,300	$ 4,700
Technology Upgrade Related Costs [Member]
Property and equipment		47,000		47,000		$ 49,700
Leasehold Improvements [Member]
Property and equipment		$ 15,600		$ 15,600

[1] Includes $47.0 million and $49.7 million at June 30, 2017 and December 31, 2016, respectively, related to our technology upgrade project and $15.6 million at June 30, 2017 of leasehold improvements related to our new corporate headquarters.

[2] Property and equipment at cost, less accumulated depreciation of $126.8 million and $118.5 million at June 30, 2017 and December 31, 2016, respectively. Depreciation expense was $4.1 million and $2.4 million for the three-month periods ended June 30, 2017 and 2016, respectively, and $8.3 million and $4.7 million for the six-month periods ended June 30, 2017 and 2016, respectively.