Note 2: Available-for-sale Securities: Schedule of Unrealized Loss On Investments Table (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 5,957	$ 6,457
Available-for-sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregated Losses	58	12
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,427	0
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregated Losses	70	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	9,384	6,457
Available for sale Securities Continuous Unrealized Loss Position Aggregate Losses	128	12
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	14,861	12,341
Available-for-sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregated Losses	224	127
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	8,526	256
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregated Losses	256	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	23,387	12,597
Available for sale Securities Continuous Unrealized Loss Position Aggregate Losses	480	127
Other Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	982
Available-for-sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregated Losses	10
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,109
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregated Losses	183
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,091
Available for sale Securities Continuous Unrealized Loss Position Aggregate Losses	193
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	65,863	29,836
Available-for-sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregated Losses	1,513	267
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	24,187	2,285
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregated Losses	1,020	36
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	90,050	32,121
Available for sale Securities Continuous Unrealized Loss Position Aggregate Losses	2,533	303
Total Investment Mortgage-Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	87,663	48,634
Available-for-sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregated Losses	1,805	406
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	37,249	3,701
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregated Losses	1,529	634
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	124,912	52,335
Available for sale Securities Continuous Unrealized Loss Position Aggregate Losses	$ 3,334	1,040
Other Debt Obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		0
Available-for-sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregated Losses		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,160
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregated Losses		598
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		1,160
Available for sale Securities Continuous Unrealized Loss Position Aggregate Losses		$ 598