Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Accretable Yield for Acquired Loan Pools (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
TeamBank
Accretable Yield for Acquired Loans Balance April 1, 2011		$ 27,287
Acquired Loans Accretion	(4,620)	(10,854)		(9,090)	(21,523)
Acquired Loans Reclassification from nonaccretable difference	1,509	6,712	[1]	5,831	7,903	[2]
Accretable Yield for Acquired Loans Balance June 30, 2011		23,145			23,145
Accretable yield for acquired loans balance April 1, 2012	14,514
Accretable yield for acquired loans balance June 30, 2012	11,403			11,403
Accretable Yield for Acquired Loans Balance January 1, 2011					36,765
Accretable yield for acquired loans balance January 1, 2012				14,662
Vantus Bank
Accretable Yield for Acquired Loans Balance April 1, 2011		31,882
Acquired Loans Accretion	(5,124)	(7,364)		(10,340)	(15,510)
Acquired Loans Reclassification from nonaccretable difference	3,304	2,365	[1]	6,255	6,597	[2]
Accretable Yield for Acquired Loans Balance June 30, 2011		26,883			26,883
Accretable yield for acquired loans balance April 1, 2012	19,702
Accretable yield for acquired loans balance June 30, 2012	17,882			17,882
Accretable Yield for Acquired Loans Balance January 1, 2011					35,796
Accretable yield for acquired loans balance January 1, 2012				21,967
Sun Security Bank
Acquired Loans Accretion	(4,482)			(7,082)
Acquired Loans Reclassification from nonaccretable difference	3,940			4,088
Accretable yield for acquired loans balance April 1, 2012	10,317
Accretable yield for acquired loans balance June 30, 2012	9,775			9,775
Accretable yield for acquired loans balance January 1, 2012				12,769
InterBank
Acquired Loans Accretion	(2,851)			(2,851)
Acquired Loans Additions	46,078
Accretable yield for acquired loans balance June 30, 2012	$ 43,227			$ 43,227

[1] Represents increases in estimated cash flows expected to be received from the acquired loan pools, primarily due to lower estimated credit losses. The numbers also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, and Sun Security Bank for the three months ended June 30, 2012, totaling $2.5 million, $2.9 million and $3.4 million, respectively, and for the three months ended June 30, 2011, totaling $2.5 million, $581,000 and $0, respectively.

[2] Represents increases in estimated cash flows expected to be received from the acquired loan pools, primarily due to lower estimated credit losses. The numbers also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, and Sun Security Bank for the six months ended June 30, 2012, totaling $2.9 million, $3.7 million, and $3.4 million, respectively, and for the six months ended June 30, 2011, totaling $2.8 million, $1.8 million and $0, respectively.