Note 3 - Securities - Securities With Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 71,309	$ 245,869
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(3,500)	(23,144)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	190,672	29,788
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(30,771)	(4,981)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	261,981	275,657
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(34,271)	(28,125)
Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	3,729	3,522
Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(320)	(90)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	3,210	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Aggregate Loss	(79)	0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value	6,939	3,522
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss	(399)	(90)
US Treasury Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	8,447
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	0	(462)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	8,434	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(499)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	8,434	8,447
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(499)	(462)
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	31,090	80,445
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(1,102)	(8,331)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	46,129	2,047
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(6,980)	(418)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	77,219	82,492
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(8,082)	(8,749)
Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	3,729	3,522
Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(320)	(90)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	3,210	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Aggregate Loss	(79)	0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value	6,939	3,522
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss	(399)	(90)
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,624	26,265
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(346)	(2,424)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	19,421	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(3,016)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	25,045	26,265
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(3,362)	(2,424)
Residential Mortgage-Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	11,095	76,526
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(742)	(7,586)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	78,403	24,569
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(13,502)	(4,056)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	89,498	101,095
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(14,244)	(11,642)
Commercial Mortgage-Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	7,301
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	0	(1,322)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	6,956	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,652)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,956	7,301
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1,652)	(1,322)
Collateralized Debt Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	22,560	30,729
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(1,250)	(2,308)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	16,697	2,713
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(3,530)	(466)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	39,257	33,442
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(4,780)	(2,774)
Other Debt Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	940	16,156
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(60)	(711)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	14,632	459
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,592)	(41)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	15,572	16,615
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (1,652)	$ (752)