Loans Receivable and The Allowance For Loan Losses: Schedule of Impaired Loans by Amount and Allocated Reserves for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Impaired loans -- Nonaccrual loans | Consumer
Loans Receivable Impaired Loan Amount	$ 1,025	$ 1,115
Loans Receivable Impaired Allocated Reserve	4	62
Impaired loans -- Nonaccrual loans | Consumer secured by one- to four-family
Loans Receivable Impaired Loan Amount	1,857	1,790
Loans Receivable Impaired Allocated Reserve	21	23
Impaired loans -- Nonaccrual loans | Total consumer
Loans Receivable Impaired Loan Amount	2,882	2,905
Loans Receivable Impaired Allocated Reserve	25	85
Impaired loans -- Nonaccrual loans | Total nonaccrual loans
Loans Receivable Impaired Loan Amount	45,181	72,988
Loans Receivable Impaired Allocated Reserve	4,378	7,197
Impaired loans -- Nonaccrual loans | Past due and still accruing
Loans Receivable Impaired Loan Amount	2,181	2,324
Loans Receivable Impaired Allocated Reserve	1	19
Impaired loans -- Nonaccrual loans | Troubled debt restructurings
Loans Receivable Impaired Loan Amount	58,010	54,533
Loans Receivable Impaired Allocated Reserve	5,983	3,100
Impaired loans -- Nonaccrual loans | Commercial real estate owner occupied
Loans Receivable Impaired Loan Amount	3,557	4,306
Loans Receivable Impaired Allocated Reserve	124	281
Impaired loans -- Nonaccrual loans | Commercial real estate investment properties
Loans Receivable Impaired Loan Amount	4,023	4,920
Loans Receivable Impaired Allocated Reserve	176	626
Impaired loans -- Nonaccrual loans | Multifamily real estate
Loans Receivable Impaired Loan Amount		362
Loans Receivable Impaired Allocated Reserve		11
Impaired loans -- Nonaccrual loans | Commercial construction
Loans Receivable Impaired Loan Amount		949
Impaired loans -- Nonaccrual loans | One- to four-family construction
Loans Receivable Impaired Loan Amount	3,805	6,622
Loans Receivable Impaired Allocated Reserve	1,859	1,921
Impaired loans -- Nonaccrual loans | Land development residential
Loans Receivable Impaired Loan Amount	4,751	19,060
Loans Receivable Impaired Allocated Reserve	709	1,485
Impaired loans -- Nonaccrual loans | Land development commercial
Loans Receivable Impaired Loan Amount	383	1,100
Loans Receivable Impaired Allocated Reserve	19	45
Impaired loans -- Nonaccrual loans | Commercial business
Loans Receivable Impaired Loan Amount	8,600	13,460
Loans Receivable Impaired Allocated Reserve	640	1,871
Impaired loans -- Nonaccrual loans | Agricultural business
Loans Receivable Impaired Loan Amount	1,010	1,896
Loans Receivable Impaired Allocated Reserve	103	629
Impaired loans -- Nonaccrual loans | One- to four-family residential
Loans Receivable Impaired Loan Amount	16,170	17,408
Loans Receivable Impaired Allocated Reserve	723	243
Total Impaired Loans
Loans Receivable Impaired Loan Amount	105,372	129,845
Loans Receivable Impaired Allocated Reserve	$ 10,362	$ 10,316