Note 11 - Losses and LAE Additional Disclosures: Claims Development (Details) $ in Thousands		Dec. 31, 2019 USD ($) payment default	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)
Claims Development [Line Items]
Number Of Payments Missed For Insured Loans | payment		2
Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 4,390,053
Short-duration Insurance Contracts, Accident Year 2010 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		1,225,474	$ 1,221,938	$ 1,219,469	$ 1,218,264	$ 1,220,289	$ 1,207,774	$ 1,195,056	$ 1,192,482	$ 1,215,136	$ 1,102,856
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 5,292
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	146,324
Short-duration Insurance Contracts, Accident Year 2011 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 1,064,054	1,060,376	1,059,116	1,061,161	1,062,579	1,050,555	1,052,277	1,152,016	$ 1,058,625
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 5,020
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	118,972
Short-duration Insurance Contracts, Accident Year 2012 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 713,839	713,750	714,783	715,646	720,502	711,213	763,969	$ 803,831
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 2,652
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	89,845
Short-duration Insurance Contracts, Accident Year 2013 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 399,356	400,243	402,259	404,333	401,444	405,334	$ 505,732
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 1,172
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	71,749
Short-duration Insurance Contracts, Accident Year 2014 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 261,507	260,098	264,620	265,891	247,074	$ 337,784
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 398
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	58,215
Short-duration Insurance Contracts, Accident Year 2015 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 183,546	183,952	178,042	198,186	$ 222,555
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 160
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	49,825
Short-duration Insurance Contracts, Accident Year 2016 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 148,811	149,753	165,440	$ 201,016
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 115
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	46,264
Short-duration Insurance Contracts, Accident Year 2017 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 133,357	151,802	$ 180,851
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 264
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	47,283
Short-duration Insurance Contracts, Accident Year 2018 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 116,634	$ 131,513
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 650
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	39,598
Short-Duration Insurance Contracts, Accident Year 2019 | Property, Liability and Casualty Insurance Product Line
Claims Development [Line Items]
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		$ 143,475
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	[1]	$ 3,117
Short-duration Insurance Contract, Cumulative Number of Reported Claims | default	[2]	42,884

[1] Represents reserves as of December 31, 2019 related to IBNR liabilities.

[2] Represents total number of new default notices received in each calendar year as compiled monthly based on reports received from loan servicers. As reflected in our Default to Claim Rate assumptions, a significant portion of reported defaults generally do not result in a claim. In certain instances, a defaulted loan may cure, and then re-default in a later period. Consistent with our reserving practice, each new event of default is treated as a unique occurrence and therefore certain loans that cure and re-default may be included as a reported default in multiple periods.