Note 8 - Other Assets Components of Other Assets (Details) - USD ($) $ in Thousands		Jun. 30, 2020		Dec. 31, 2019
Other Assets [Abstract]
Prepaid federal income taxes (Note 9)		$ 191,889		$ 134,800
Company-owned life insurance		110,076		105,721
Internal-use software (net of accumulated amortization of $77,344 and $73,498)		61,639		58,356
Accumulated amortization		77,344		73,498
Loaned securities (Note 5)		16,332		66,442
Right-of-use assets		33,851	[1]	37,866
Accrued investment income		34,179		32,333
Property and equipment (net of accumulated depreciation of $68,681 and $68,436)		27,504		29,523
Accumulated depreciation		68,681		68,436
Deferred policy acquisition costs		21,774		20,759
Reinsurance recoverables		56,852		16,976
Unbilled receivables		3,091		13,772
Assets held for sale	[2]	0		24,908
Other Assets, Miscellaneous		28,679		26,163
Other Assets		$ 585,866		$ 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.