Interest-bearing Deposits and Securities: Schedule of Amortized Cost and Estimated Fair Value of Available for Sale Securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Securities-available-for-sale, amortized cost	$ 433,051	$ 462,579
United States Government and agency obligations
Securities-available-for-sale, amortized cost	227,344	338,165
Available-for-sale Securities, Gross Unrealized Gains	700	862
Available-for-sale Securities, Gross Unrealized Losses	(20)	(56)
Available-for-sale Securities, Fair Value Disclosure	228,024	338,971
Available for Sale Securities Percent of Total	52.30%	72.80%
Municipal bonds taxable
Securities-available-for-sale, amortized cost	12,587	10,358
Available-for-sale Securities, Gross Unrealized Gains	257	225
Available-for-sale Securities, Gross Unrealized Losses	(2)	(2)
Available-for-sale Securities, Fair Value Disclosure	12,842	10,581
Available for Sale Securities Percent of Total	2.90%	2.30%
Municipal bonds tax exempt
Securities-available-for-sale, amortized cost	20,646	16,535
Available-for-sale Securities, Gross Unrealized Gains	225	210
Available-for-sale Securities, Gross Unrealized Losses	(11)	(16)
Available-for-sale Securities, Fair Value Disclosure	20,860	16,729
Available for Sale Securities Percent of Total	4.80%	3.60%
Total municipal bonds
Securities-available-for-sale, amortized cost	33,233	26,893
Available-for-sale Securities, Gross Unrealized Gains	482	435
Available-for-sale Securities, Gross Unrealized Losses	(13)	(18)
Available-for-sale Securities, Fair Value Disclosure	33,702	27,310
Available for Sale Securities Percent of Total	7.70%	5.90%
Corporate bonds
Securities-available-for-sale, amortized cost	4,032	6,240
Available-for-sale Securities, Gross Unrealized Gains	36	20
Available-for-sale Securities, Fair Value Disclosure	4,068	6,260
Available for Sale Securities Percent of Total	0.90%	1.30%
Mortgage-backed or related securities FHLMC
Securities-available-for-sale, amortized cost	53,656	30,504
Available-for-sale Securities, Gross Unrealized Gains	169	284
Available-for-sale Securities, Gross Unrealized Losses	(175)	(33)
Available-for-sale Securities, Fair Value Disclosure	53,650	30,755
Available for Sale Securities Percent of Total	12.30%	6.60%
Mortgage-backed or related securities FNMA
Securities-available-for-sale, amortized cost	64,986	40,897
Available-for-sale Securities, Gross Unrealized Gains	748	310
Available-for-sale Securities, Gross Unrealized Losses	(56)	(115)
Available-for-sale Securities, Fair Value Disclosure	65,678	41,092
Available for Sale Securities Percent of Total	15.10%	8.80%
Mortgage-backed or related securities GNMA
Securities-available-for-sale, amortized cost	15,476	18,145
Available-for-sale Securities, Gross Unrealized Gains	1,260	1,427
Available-for-sale Securities, Fair Value Disclosure	16,736	19,572
Available for Sale Securities Percent of Total	3.80%	4.20%
Mortgage-backed or related securities other
Securities-available-for-sale, amortized cost	1,672	1,735
Available-for-sale Securities, Gross Unrealized Gains	108	100
Available-for-sale Securities, Fair Value Disclosure	1,780	1,835
Available for Sale Securities Percent of Total	0.40%	0.40%
Total mortgage-backed or related securities
Securities-available-for-sale, amortized cost	135,790	91,281
Available-for-sale Securities, Gross Unrealized Gains	2,285	2,121
Available-for-sale Securities, Gross Unrealized Losses	(231)	(148)
Available-for-sale Securities, Fair Value Disclosure	137,844	93,254
Available for Sale Securities Percent of Total	31.60%	20.00%
Asset-backed securities - SLMA
Securities-available-for-sale, amortized cost	32,652
Available-for-sale Securities, Gross Unrealized Losses	(160)
Available-for-sale Securities, Fair Value Disclosure	32,492
Available for Sale Securities Percent of Total	7.50%
Total available for sale securities
Securities-available-for-sale, amortized cost	433,051	462,579
Available-for-sale Securities, Gross Unrealized Gains	3,503	3,438
Available-for-sale Securities, Gross Unrealized Losses	(424)	(222)
Available-for-sale Securities, Fair Value Disclosure	$ 436,130	$ 465,795
Available for Sale Securities Percent of Total	100.00%	100.00%

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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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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- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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