Note 16: Disclosures About Fair Value of Financial Instruments: Schedule Of Financial Instruments Fair Value (Details) $ in Thousands	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Financial Assets | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	$ 279,769	$ 199,183
Financial Instruments, Owned, at Fair Value	$ 279,769	$ 199,183
Fair Value by Fair Value Hierarchy Level	1	1
Financial Assets | Held-to-maturity Securities
Financial Instruments Owned Carrying Amount	$ 247	$ 353
Financial Instruments, Owned, at Fair Value	$ 258	$ 384
Fair Value by Fair Value Hierarchy Level	2	2
Financial Assets | Mortgage Loans Held For Sale
Financial Instruments Owned Carrying Amount	$ 16,445	$ 12,261
Financial Instruments, Owned, at Fair Value	$ 16,445	$ 12,261
Fair Value by Fair Value Hierarchy Level	2	2
Financial Assets | Loans Receivable
Financial Instruments Owned Carrying Amount	$ 3,759,966	$ 3,340,536
Financial Instruments, Owned, at Fair Value	$ 3,766,709	$ 3,355,924
Fair Value by Fair Value Hierarchy Level	3	3
Financial Assets | Accrued Interest Receivable
Financial Instruments Owned Carrying Amount	$ 11,875	$ 10,930
Financial Instruments, Owned, at Fair Value	$ 11,875	$ 10,930
Fair Value by Fair Value Hierarchy Level	3	3
Financial Assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	$ 13,034	$ 15,303
Financial Instruments, Owned, at Fair Value	$ 13,034	$ 15,303
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Subordinated Debentures
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 | Deposits
Financial Instruments Owned Carrying Amount	$ 3,677,230	$ 3,268,626
Financial Instruments, Owned, at Fair Value	$ 3,683,751	$ 3,271,318
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount	$ 31,452	$ 263,546
Financial Instruments, Owned, at Fair Value	$ 32,379	$ 264,331
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Short-term Debt
Financial Instruments Owned Carrying Amount	$ 286,023	$ 117,477
Financial Instruments, Owned, at Fair Value	$ 286,023	$ 117,477
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	$ 73,537
Financial Instruments, Owned, at Fair Value	$ 76,031
Fair Value by Fair Value Hierarchy Level	2
Financial Liabilities | Accrued Interest Payable
Financial Instruments Owned Carrying Amount	$ 2,723	$ 1,080
Financial Instruments, Owned, at Fair Value	$ 2,723	$ 1,080
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	$ 92	$ 145
Financial Instruments, Owned, at Fair Value	$ 92	$ 145
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