Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill impairment	$ 0	$ 0	$ 5,597,000
Goodwill	1,214,000	1,214,000
Weighted average amortization period for Core Deposit Intangibles	10 years
Oklahoma Banking [Member]
Goodwill	200,000
Texas Banking [Member]
Goodwill	1,000,000
Core Deposits [Member]
Amortization	500,000	500,000
Servicing Contracts [Member]
Amortization	$ 700,000	$ 500,000

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details