Loans and Allowance For Loan Losses: Schedule of Balance in the Allowance for Loan Losses Based on Portfolio Segment and Impairment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Individually evaluated for impairment
Allowance Balance One- to Four-Family Residential and Construction	$ 4,989
Allowance Balance Other Residential	89
Allowance Balance Commercial Real Estate	3,584
Allowance Balance Commercial Construction	594
Allowance Balance Commercial Business	736
Allowance Balance Consumer	38
Allowance Balance Total	10,030
Collectively evaluated for impairment
Allowance Balance One- to Four-Family Residential and Construction	6,435
Allowance Balance Other Residential	2,999
Allowance Balance Commercial Real Estate	14,806
Allowance Balance Commercial Construction	2,358
Allowance Balance Commercial Business	2,238
Allowance Balance Consumer	2,336
Allowance Balance Total	31,172
Loans acquired and accounted for under ASC 310-30
Allowance Balance Commercial Construction	30
Allowance Balance Total	30
Loans Individually evaluated for impairment
Allowance Balance One- to Four-Family Residential and Construction	39,519
Allowance Balance Other Residential	20,802
Allowance Balance Commercial Real Estate	99,254
Allowance Balance Commercial Construction	27,592
Allowance Balance Commercial Business	10,720
Allowance Balance Consumer	839
Allowance Balance Total	198,726
Loans collectively evaluated for impairment
Allowance Balance One- to Four-Family Residential and Construction	283,371
Allowance Balance Other Residential	222,940
Allowance Balance Commercial Real Estate	600,353
Allowance Balance Commercial Construction	160,768
Allowance Balance Commercial Business	225,665
Allowance Balance Consumer	183,183
Allowance Balance Total	1,676,280
Loans - loans acquired and accounted for under ASC 310-30
Allowance Balance One- to Four-Family Residential and Construction	109,909
Allowance Balance Other Residential	25,877
Allowance Balance Commercial Real Estate	157,805
Allowance Balance Commercial Construction	40,215
Allowance Balance Commercial Business	28,784
Allowance Balance Consumer	33,947
Allowance Balance Total	$ 396,537