Loans and Allowance For Loan Losses: Schedule of Allowance for Loan Losses by Portfolio Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Balance April 1, 2012
Allowance One- to Four-Family Residential and Construction	$ 9,413	$ 11,546
Allowance Other Residential	4,023	3,798
Allowance Commercial Real Estate	20,109	15,807
Allowance Commercial Construction	3,155	5,235
Allowance Commercial Business	3,059	3,010
Allowance Consumer	1,773	2,438
Allowance Total	41,532	41,834
Provision charged to expense
Allowance One- to Four-Family Residential and Construction	598	772	(1,106)	4,010
Allowance Other Residential	2,924	1,756	3,857	2,649
Allowance Commercial Real Estate	3,191	2,673	9,316	5,885
Allowance Commercial Construction	8,689	2,348	13,298	3,145
Allowance Commercial Business	680	38	1,246	8
Allowance Consumer	1,518	844	1,066	934
Allowance Total	17,600	8,431	27,677	16,631
Losses charged off
Allowance One- to Four-Family Residential and Construction	(2,135)	(758)	(2,494)	(3,959)
Allowance Other Residential	(3,252)	(1,926)	(3,252)	(2,888)
Allowance Commercial Real Estate	(7,795)	(3,526)	(12,205)	(5,269)
Allowance Commercial Construction	(5,132)	(2,433)	(9,592)	(3,851)
Allowance Commercial Business	(512)	(924)	(1,053)	(1,716)
Allowance Consumer	(727)	(917)	(962)	(1,807)
Allowance Total	(19,553)	(10,484)	(29,558)	(19,490)
Recoveries
Allowance One- to Four-Family Residential and Construction	23	2	75	28
Allowance Other Residential	317	1	319	2
Allowance Commercial Real Estate	87	49	91	51
Allowance Commercial Construction	217	5	241	9
Allowance Commercial Business	114	200	174	751
Allowance Consumer	385	449	471	1,018
Allowance Total	1,143	706	1,371	1,859
Balance June 30, 2012
Allowance One- to Four-Family Residential and Construction	7,899	11,562
Allowance Other Residential	4,012	3,629
Allowance Commercial Real Estate	15,592	15,003
Allowance Commercial Construction	6,929	5,155
Allowance Commercial Business	3,341
Allowance Consumer	2,949	2,814
Allowance Total	40,722	40,487
Balance January 1, 2012
Allowance One- to Four-Family Residential and Construction			11,424	11,483
Allowance Other Residential			3,088	3,866
Allowance Commercial Real Estate			18,390	14,336
Allowance Commercial Construction			2,982	5,852
Allowance Commercial Business			2,974	3,281
Allowance Consumer			2,374	2,669
Allowance Total			41,232	41,487
Balance June 30, 2011
Allowance One- to Four-Family Residential and Construction			7,899	11,562
Allowance Other Residential			4,012	3,629
Allowance Commercial Real Estate			15,592	15,003
Allowance Commercial Construction			6,929	5,155
Allowance Commercial Business			3,341	2,324
Allowance Consumer			2,949	2,814
Allowance Total			40,722	40,487
Ending balance individually evaluated for impairment
Allowance One- to Four-Family Residential and Construction			2,029
Allowance Other Residential			246
Allowance Commercial Real Estate			1,143
Allowance Commercial Construction			3,976
Allowance Commercial Business			517
Allowance Consumer			147
Allowance Total			8,058
Ending balance collectively evaluated for impairment
Allowance One- to Four-Family Residential and Construction			5,870
Allowance Other Residential			3,766
Allowance Commercial Real Estate			14,449
Allowance Commercial Construction			2,942
Allowance Commercial Business			2,825
Allowance Consumer			2,802
Allowance Total			32,654
Loans acquired and accounted for under ASC 310-30
Allowance Commercial Construction			10
Allowance Total			10
Loans Individually evaluated for impairment
Allowance One- to Four-Family Residential and Construction			20,318
Allowance Other Residential			17,335
Allowance Commercial Real Estate			39,634
Allowance Commercial Construction			20,763
Allowance Commercial Business			6,955
Allowance Consumer			917
Allowance Total			105,922
Loans collectively evaluated for impairment
Allowance One- to Four-Family Residential and Construction			285,325
Allowance Other Residential			268,741
Allowance Commercial Real Estate			625,726
Allowance Commercial Construction			150,410
Allowance Commercial Business			225,695
Allowance Consumer			195,310
Allowance Total			1,751,207
Loans - loans acquired and accounted for under ASC 310-30
Allowance One- to Four-Family Residential and Construction			300,122
Allowance Other Residential			60,216
Allowance Commercial Real Estate			164,276
Allowance Commercial Construction			1,787
Allowance Commercial Business			19,559
Allowance Consumer			40,386
Allowance Total			$ 586,346