Note 3: Securities: Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Investment and mortgage backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 68,088	$ 48,634
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	476	406
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	32,536	3,701
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1,124	634
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	100,624	52,335
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,600	1,040
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,931	6,457
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	30	12
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,465	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	33	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	8,396	6,457
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	63	12
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	14,502	12,341
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	150	127
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	8,306	256
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	168	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	22,808	12,597
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	318	127
Other Debt Obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,271	1,160
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	470	598
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,271	1,160
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	470	598
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	47,655	29,836
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	296	267
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	20,494	2,285
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	453	36
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	68,149	32,121
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 749	$ 303