Note 8 - Other Assets Components of Other Assets (Details) - USD ($) $ in Thousands		3 Months Ended			12 Months Ended
		Mar. 31, 2019		Mar. 31, 2018	Dec. 31, 2018
Company-owned life insurance		$ 85,729			$ 83,377
Right-of-use assets	[2]	47,150	[1]		0
Internal-use software	[3]	46,611			51,367
Property and equipment	[4]	39,530			37,090
Accrued investment income		33,275			34,878
Unbilled receivables		22,967			19,917
Loaned securities (Note 5)		22,606			27,860
Deferred policy acquisition costs		17,594			17,311
Reinsurance recoverables		15,401			14,402
Current federal income tax receivable	[5]	0			44,506
Other		42,815			36,992
Total other assets		373,678			367,700
Accumulated Amortization, Right-of-Use Assets		2,300
Capitalized Computer Software, Accumulated Amortization		63,700			60,300
Capitalized Computer Software, Impairments		3,800			5,100
Capitalized Computer Software, Amortization		3,100		$ 2,800
Property and Equipment, Owned, Accumulated Depreciation		64,500			62,900
Depreciation expense		$ 2,100		$ 1,900
REMIC Residual | Internal Revenue Service (IRS)
Refund of Qualified Deposit Assets from U.S. Department of Treasury					$ 57,200

[1] Classified in other assets in our condensed consolidated balance sheets. See Note 8.

[2] Represents right-of-use assets recognized as a result of our adoption, as of January 1, 2019, of the new accounting and disclosure requirements for leases of property, plant and equipment. See Note 1 for additional information. Right-of-use assets are shown less accumulated amortization of $2.3 million at March 31, 2019.

[3] Internal-use software, at cost, has been reduced by accumulated amortization of $63.7 million and $60.3 million at March 31, 2019 and December 31, 2018, respectively, as well as $3.8 million of impairment charges in the three months ended March 31, 2019, and $5.1 million of impairment charges in 2018. Amortization expense was $3.1 million and $2.8 million for the three-month periods ended March 31, 2019 and 2018, respectively.

[4] Property and equipment at cost, less accumulated depreciation of $64.5 million and $62.9 million at March 31, 2019 and December 31, 2018, respectively. Depreciation expense was $2.1 million and $1.9 million for the three-month periods ended March 31, 2019 and 2018, respectively.

[5] During the three months ended March 31, 2019, current federal income tax receivable was reduced by our receipt of the remaining $57.2 million refund from amounts on deposit with the IRS related to the settlement of the IRS Matter.