Note 12: Fair Value Measurement: Schedule of Financial Instruments Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financial Assets | Cash and Cash Equivalents
Financial Instruments Owned Carrying Amount	$ 398,382	$ 227,925
Financial Instruments, Owned, at Fair Value	398,382	227,925
Fair Value by Fair Value Hierarchy Level	1	1
Financial Assets | Held-to-maturity Securities
Financial Instruments Owned Carrying Amount	805	805
Financial Instruments, Owned, at Fair Value	914	912
Fair Value by Fair Value Hierarchy Level	2	2
Financial Assets | Mortgage Loans Held For Sale
Financial Instruments Owned Carrying Amount	6,770	7,239
Financial Instruments, Owned, at Fair Value	6,770	7,239
Fair Value by Fair Value Hierarchy Level	2	2
Financial Assets | Loans Receivable
Financial Instruments Owned Carrying Amount	2,513,985	2,439,530
Financial Instruments, Owned, at Fair Value	2,646,389	2,442,917
Fair Value by Fair Value Hierarchy Level	3	3
Financial Assets | Accrued Interest Receivable
Financial Instruments Owned Carrying Amount	10,547	11,408
Financial Instruments, Owned, at Fair Value	10,547	11,408
Fair Value by Fair Value Hierarchy Level	3	3
Financial Assets | Investment in Federal Home Loan Bank Stock
Financial Instruments Owned Carrying Amount	9,333	9,822
Financial Instruments, Owned, at Fair Value	9,333	9,822
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Deposits
Financial Instruments Owned Carrying Amount	3,016,047	2,808,626
Financial Instruments, Owned, at Fair Value	3,021,349	2,813,779
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Federal Home Loan Bank Advances
Financial Instruments Owned Carrying Amount	126,260	126,757
Financial Instruments, Owned, at Fair Value	130,743	131,281
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Short-term Debt
Financial Instruments Owned Carrying Amount	129,386	136,109
Financial Instruments, Owned, at Fair Value	129,386	136,109
Fair Value by Fair Value Hierarchy Level	3	3
Financial Liabilities | Repurchase Agreements
Financial Instruments Owned Carrying Amount	50,000	50,000
Financial Instruments, Owned, at Fair Value	53,027	53,485
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	966	1,099
Financial Instruments, Owned, at Fair Value	966	1,099
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	47	76
Financial Instruments, Owned, at Fair Value	$ 47	$ 76
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