Note 8 - Other Assets Components of Other Assets (Details) - USD ($) $ in Thousands		Mar. 31, 2020		Dec. 31, 2019
Other Assets [Abstract]
Prepaid federal income taxes (Note 9)		$ 134,800		$ 134,800
Company-owned life insurance		104,141		105,721
Internal-use software (net of accumulated amortization of $74,601 and $73,498)		59,790		58,356
Accumulated amortization		74,601		73,498
Loaned securities (Note 5)		47,520		66,442
Right-of-use assets		35,837	[1]	37,866
Accrued investment income		32,559		32,333
Property and equipment (net of accumulated depreciation of $67,008 and $68,436)		28,125		29,523
Accumulated depreciation		67,008		68,436
Deferred policy acquisition costs		20,855		20,759
Reinsurance recoverables		17,722		16,976
Unbilled receivables		5,130		13,772
Assets held for sale	[2]	0		24,908
Other Assets, Miscellaneous		26,708		26,163
Other Assets		$ 513,187		$ 567,619

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

[2] Related to the sale of Clayton. See Note 4 and 7 of Notes to Consolidated Financial Statements in our 2019 Form 10-K for additional information on assets held for sale. Liabilities held for sale at December 31, 2019 are included in other liabilities on our condensed consolidated balance sheets.