Interest-bearing Deposits and Securities: Schedule of Amortized Cost and Estimated Fair Value of Trading Securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
United States Government and agency obligations
Trading Securities Amortized Cost	$ 1,400	$ 2,401
Trading Securities, Fair Value Disclosure	1,645	2,635
Trading Securities Percent of Total	2.10%	3.30%
Municipal bonds taxable
Trading Securities Amortized Cost	85	391
Trading Securities, Fair Value Disclosure	92	420
Trading Securities Percent of Total	0.10%	0.50%
Municipal bonds tax exempt
Trading Securities Amortized Cost	5,437	5,431
Trading Securities, Fair Value Disclosure	5,509	5,542
Trading Securities Percent of Total	7.10%	6.90%
Trading Securities Municipal Bonds
Trading Securities Amortized Cost	5,522
Trading Securities, Fair Value Disclosure	5,601
Trading Securities Percent of Total	7.20%
Corporate bonds
Trading Securities Amortized Cost	62,948	63,502
Trading Securities, Fair Value Disclosure	37,605	35,055
Trading Securities Percent of Total	48.60%	43.40%
Mortgage-backed or related securities FHLMC
Trading Securities Amortized Cost	8,509	10,535
Trading Securities, Fair Value Disclosure	9,132	11,246
Trading Securities Percent of Total	11.80%	13.90%
Mortgage-backed or related securities FNMA
Trading Securities Amortized Cost	20,927	23,489
Trading Securities, Fair Value Disclosure	22,931	25,427
Trading Securities Percent of Total	29.70%	31.50%
Total mortgage-backed or related securities
Trading Securities Amortized Cost	29,436	34,024
Trading Securities, Fair Value Disclosure	32,063	36,673
Trading Securities Percent of Total	41.50%	45.40%
Equity Trading Securities
Trading Securities Amortized Cost	6,914	6,914
Trading Securities, Fair Value Disclosure	454	402
Trading Securities Percent of Total	0.60%	0.50%
Total trading securities
Trading Securities Amortized Cost	106,220	112,663
Trading Securities, Fair Value Disclosure	77,368	80,727
Trading Securities Percent of Total	100.00%	100.00%
Total municipal bonds
Trading Securities Amortized Cost		5,822
Trading Securities, Fair Value Disclosure		$ 5,962
Trading Securities Percent of Total		7.40%

- Definition

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 Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.

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