Note 2: Available for Sale Securities: Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 0	$ 5,957
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	58
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	6,969	3,427
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	15	70
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,969	9,384
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	15	128
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	14,861
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	224
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	8,531	8,526
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	68	256
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	8,531	23,387
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	68	480
Other Debt Obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	982
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	10
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	985	1,109
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	198	183
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	985	2,091
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	198	193
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,175	65,863
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	1,513
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	34,148	24,187
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	316	1,020
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	35,323	90,050
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	317	2,533
Total investments and mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,175	87,663
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	1,805
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	50,633	37,249
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	597	1,529
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	51,808	124,912
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 598	$ 3,334