Note 14: Disclosures About Fair Value of Financial Instruments: Schedule Of Financial Instruments Fair Value (Details) $ in Thousands	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Financial Assets | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	$ 212,505	$ 279,769
Financial Instruments, Owned, at Fair Value	$ 212,505	$ 279,769
Fair Value by Fair Value Hierarchy Level	1	1
Financial Assets | Held-to-maturity Securities
Financial Instruments Owned Carrying Amount	$ 130	$ 247
Financial Instruments, Owned, at Fair Value	$ 134	$ 258
Fair Value by Fair Value Hierarchy Level	2	2
Financial Assets | Mortgage Loans Held for Sale
Financial Instruments Owned Carrying Amount	$ 8,178	$ 16,445
Financial Instruments, Owned, at Fair Value	$ 8,178	$ 16,445
Fair Value by Fair Value Hierarchy Level	2	2
Financial Assets | Loans Receivable
Financial Instruments Owned Carrying Amount	$ 3,772,816	$ 3,759,966
Financial Instruments, Owned, at Fair Value	$ 3,783,674	$ 3,766,709
Fair Value by Fair Value Hierarchy Level	3	3
Financial Assets | Accrued Interest Receivable
Financial Instruments Owned Carrying Amount	$ 10,818	$ 11,875
Financial Instruments, Owned, at Fair Value	$ 10,818	$ 11,875
Fair Value by Fair Value Hierarchy Level	3	3
Financial Assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	$ 12,842	$ 13,034
Financial Instruments, Owned, at Fair Value	$ 12,842	$ 13,034
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Deposits
Financial Instruments Owned Carrying Amount	$ 3,572,645	$ 3,677,230
Financial Instruments, Owned, at Fair Value	$ 3,579,608	$ 3,683,751
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount		$ 31,452
Financial Instruments, Owned, at Fair Value		$ 32,379
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Short-term Debt
Financial Instruments Owned Carrying Amount	$ 297,357	$ 286,023
Financial Instruments, Owned, at Fair Value	$ 297,357	$ 286,023
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Junior Subordinated Debt
Financial Instruments Owned Carrying Amount	$ 25,774	$ 25,774
Financial Instruments, Owned, at Fair Value	$ 25,774	$ 25,774
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	$ 73,613	$ 73,537
Financial Instruments, Owned, at Fair Value	$ 76,125	$ 76,031
Fair Value by Fair Value Hierarchy Level	2	2
Financial Liabilities | Accrued Interest Payable
Financial Instruments Owned Carrying Amount	$ 2,587	$ 2,723
Financial Instruments, Owned, at Fair Value	$ 2,587	$ 2,723
Fair Value by Fair Value Hierarchy Level	3	3
Unrecognized Financial Instruments Net of Contractual Value | Loan Origination Commitments
Fair Value by Fair Value Hierarchy Level	3	3
Unrecognized Financial Instruments Net of Contractual Value | Letter of Credit
Financial Instruments Owned Carrying Amount	$ 66	$ 92
Financial Instruments, Owned, at Fair Value	$ 66	$ 92
Fair Value by Fair Value Hierarchy Level	3	3
Unrecognized Financial Instruments Net of Contractual Value | Line of Credit
Fair Value by Fair Value Hierarchy Level	3	3