Interest-bearing Deposits and Securities: Schedule of Aging of Unrealized Loss and Fair Value of Available for Sale Securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
United States Government and agency obligations
Available-for-sale Securities, Fair Value Disclosure	$ 228,024	$ 338,971
Available-for-sale Securities, Gross Unrealized Losses	(20)	(56)
Municipal bonds taxable
Available-for-sale Securities, Fair Value Disclosure	12,842	10,581
Available-for-sale Securities, Gross Unrealized Losses	(2)	(2)
Municipal bonds tax exempt
Available-for-sale Securities, Fair Value Disclosure	20,860	16,729
Available-for-sale Securities, Gross Unrealized Losses	(11)	(16)
Total municipal bonds
Available-for-sale Securities, Fair Value Disclosure	33,702	27,310
Available-for-sale Securities, Gross Unrealized Losses	(13)	(18)
Mortgage-backed or related securities FNMA
Available-for-sale Securities, Fair Value Disclosure	65,678	41,092
Available-for-sale Securities, Gross Unrealized Losses	(56)	(115)
Mortgage-backed or related securities FHLMC
Available-for-sale Securities, Fair Value Disclosure	53,650	30,755
Available-for-sale Securities, Gross Unrealized Losses	(175)	(33)
Total mortgage-backed or related securities
Available-for-sale Securities, Fair Value Disclosure	137,844	93,254
Available-for-sale Securities, Gross Unrealized Losses	(231)	(148)
Asset-backed securities - SLMA
Available-for-sale Securities, Fair Value Disclosure	32,492
Available-for-sale Securities, Gross Unrealized Losses	(160)
Less Than 12 Months \| United States Government and agency obligations
Available-for-sale Securities, Fair Value Disclosure	32,016	74,326
Available-for-sale Securities, Gross Unrealized Losses	(20)	(56)
Less Than 12 Months \| Municipal bonds taxable
Available-for-sale Securities, Fair Value Disclosure	5,873	3,599
Available-for-sale Securities, Gross Unrealized Losses	(2)	(2)
Less Than 12 Months \| Municipal bonds tax exempt
Available-for-sale Securities, Fair Value Disclosure	3,083	4,075
Available-for-sale Securities, Gross Unrealized Losses	(11)	(16)
Less Than 12 Months \| Total municipal bonds
Available-for-sale Securities, Fair Value Disclosure	8,956	7,674
Available-for-sale Securities, Gross Unrealized Losses	(13)	(18)
Less Than 12 Months \| Mortgage-backed or related securities FNMA
Available-for-sale Securities, Fair Value Disclosure	18,113	27,332
Available-for-sale Securities, Gross Unrealized Losses	(56)	(115)
Less Than 12 Months \| Mortgage-backed or related securities FHLMC
Available-for-sale Securities, Fair Value Disclosure	32,676	6,556
Available-for-sale Securities, Gross Unrealized Losses	(175)	(33)
Less Than 12 Months \| Total mortgage-backed or related securities
Available-for-sale Securities, Fair Value Disclosure	50,789	33,888
Available-for-sale Securities, Gross Unrealized Losses	(231)	(148)
Less Than 12 Months \| Asset-backed securities - SLMA
Available-for-sale Securities, Fair Value Disclosure	32,492
Available-for-sale Securities, Gross Unrealized Losses	(160)
Less Than 12 Months \| Total aging of unrealized losses and fair value of related securities
Available-for-sale Securities, Fair Value Disclosure	124,253	115,888
Available-for-sale Securities, Gross Unrealized Losses	(424)	(222)
Total Securities Aging \| United States Government and agency obligations
Available-for-sale Securities, Fair Value Disclosure	32,016	74,326
Available-for-sale Securities, Gross Unrealized Losses	(20)	(56)
Total Securities Aging \| Municipal bonds taxable
Available-for-sale Securities, Fair Value Disclosure	5,873	3,599
Available-for-sale Securities, Gross Unrealized Losses	(2)	(2)
Total Securities Aging \| Municipal bonds tax exempt
Available-for-sale Securities, Fair Value Disclosure	3,083	4,075
Available-for-sale Securities, Gross Unrealized Losses	(11)	(16)
Total Securities Aging \| Total municipal bonds
Available-for-sale Securities, Fair Value Disclosure	8,956	7,674
Available-for-sale Securities, Gross Unrealized Losses	(13)	(18)
Total Securities Aging \| Mortgage-backed or related securities FNMA
Available-for-sale Securities, Fair Value Disclosure	18,113	27,332
Available-for-sale Securities, Gross Unrealized Losses	(56)	(115)
Total Securities Aging \| Mortgage-backed or related securities FHLMC
Available-for-sale Securities, Fair Value Disclosure	32,676	6,556
Available-for-sale Securities, Gross Unrealized Losses	(175)	(33)
Total Securities Aging \| Total mortgage-backed or related securities
Available-for-sale Securities, Fair Value Disclosure	50,789	33,888
Available-for-sale Securities, Gross Unrealized Losses	(231)	(148)
Total Securities Aging \| Asset-backed securities - SLMA
Available-for-sale Securities, Fair Value Disclosure	32,492
Available-for-sale Securities, Gross Unrealized Losses	(160)
Total Securities Aging \| Total aging of unrealized losses and fair value of related securities
Available-for-sale Securities, Fair Value Disclosure	124,253	115,888
Available-for-sale Securities, Gross Unrealized Losses	$ (424)	$ (222)

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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