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Note 12 - Borrowings and Financing Activities (Tables)
 9 Months Ended
Sep. 30, 2021
Senior Notes [Abstract]  
Schedule of Debt [Table Text Block]
The carrying value of our debt at September 30, 2021 and December 31, 2020 was as follows.
Borrowings
(In thousands) September 30,
2021		December 31,
2020
Senior notes
Senior Notes due 2024$446,346 $445,512 
Senior Notes due 2025517,950 516,634 
Senior Notes due 2027444,206 443,528 
Total senior notes$1,408,502 $1,405,674 
FHLB advances
FHLB advances due 2021$31,667 $67,500 
FHLB advances due 202261,050 61,050 
FHLB advances due 202352,994 27,995 
FHLB advances due 202413,954 9,954 
FHLB advances due 20259,984 9,984 
FHLB advances due 20273,000 — 
Total FHLB advances$172,649 $176,483