Note 12: Fair Value Measurement: Schedule of Financial Instruments Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financial Assets | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	$ 339,814	$ 404,141
Financial Instruments, Owned, at Fair Value	339,814	404,141
Fair Value by Fair Value Hierarchy Level	1	1
Financial Assets | Held-to-maturity Securities
Financial Instruments Owned Carrying Amount	805	920
Financial Instruments, Owned, at Fair Value	915	1,084
Fair Value by Fair Value Hierarchy Level	2	2
Financial Assets | Mortgage Loans Held for Sale
Financial Instruments Owned Carrying Amount	10,047	26,829
Financial Instruments, Owned, at Fair Value	10,047	26,829
Fair Value by Fair Value Hierarchy Level	2	2
Financial Assets | Loans Receivable
Financial Instruments Owned Carrying Amount	2,328,738	2,319,638
Financial Instruments, Owned, at Fair Value	2,329,551	2,326,051
Fair Value by Fair Value Hierarchy Level	3	3
Financial Assets | Accrued Interest Receivable
Financial Instruments Owned Carrying Amount	10,932	12,755
Financial Instruments, Owned, at Fair Value	10,932	12,755
Fair Value by Fair Value Hierarchy Level	3	3
Financial Assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	9,855	10,095
Financial Instruments, Owned, at Fair Value	9,855	10,095
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Deposits
Financial Instruments Owned Carrying Amount	2,852,534	3,153,193
Financial Instruments, Owned, at Fair Value	2,860,194	3,162,288
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount	127,808	126,730
Financial Instruments, Owned, at Fair Value	132,368	131,280
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Short-term Debt
Financial Instruments Owned Carrying Amount	135,791	180,416
Financial Instruments, Owned, at Fair Value	135,791	180,416
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Repurchase Agreements
Financial Instruments Owned Carrying Amount	50,000	53,039
Financial Instruments, Owned, at Fair Value	53,946	58,901
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Subordinated Debt
Financial Instruments Owned Carrying Amount	30,929	30,929
Financial Instruments, Owned, at Fair Value	30,929	30,929
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Accrued Interest Payable
Financial Instruments Owned Carrying Amount	1,121	1,322
Financial Instruments, Owned, at Fair Value	1,121	1,322
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	82	84
Financial Instruments, Owned, at Fair Value	$ 82	$ 84
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