Note 6: Investment Securities: Schedule of Amortized Cost and Fair Value of Available for Sale Securities by Contractual Maturity (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
One year or less
Available for Sale Securities Amortized Cost by Contractual Maturity	$ 241
Available for Sale Securities Fair Value by Contractual Maturity	241
After one through five years
Available for Sale Securities Amortized Cost by Contractual Maturity	975
Available for Sale Securities Fair Value by Contractual Maturity	992
After five through ten years
Available for Sale Securities Amortized Cost by Contractual Maturity	10,135
Available for Sale Securities Fair Value by Contractual Maturity	10,661
After ten years
Available for Sale Securities Amortized Cost by Contractual Maturity	185,188
Available for Sale Securities Fair Value by Contractual Maturity	195,348
Securities not due on a single maturity date
Available for Sale Securities Amortized Cost by Contractual Maturity	561,018
Available for Sale Securities Fair Value by Contractual Maturity	577,894
Equity Securities Contractual Maturity
Available for Sale Securities Amortized Cost by Contractual Maturity	847
Available for Sale Securities Fair Value by Contractual Maturity	1,982
Total Available For Sale Securities By Contractua lMaturity
Available for Sale Securities Amortized Cost by Contractual Maturity	758,404
Available for Sale Securities Fair Value by Contractual Maturity	$ 787,118