Fair Value Measurements, Balance Sheet Grouping (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financial assets [Abstract]
Investment securities available for sale	$ 372,968	$ 295,955
FHLB stock	1,600
Carrying value [Member]
Financial assets [Abstract]
Cash and cash equivalents	32,145	25,399
Interest-bearing deposit	75,428	80,514
Investment securities available for sale	372,968	295,955
FHLB stock	7,441	7,576
Loans held for sale	18,043	22,421
Non-covered loans	853,134	812,830
Covered loans	217,339	269,081
Bank owned life insurance	17,704	17,513
FDIC indemnification asset	34,571	65,586
Financial liabilities [Abstract]
Deposits	1,462,973	1,466,344
Junior subordinated debentures	25,774	25,774
Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	32,145	25,399
Interest-bearing deposit	75,428	80,514
Investment securities available for sale	372,968	295,955
FHLB stock	7,441	7,576
Loans held for sale	18,043	22,421
Non-covered loans	858,660	821,964
Covered loans	234,396	304,145
Bank owned life insurance	17,704	17,513
FDIC indemnification asset	22,630	41,041
Financial liabilities [Abstract]
Deposits	1,468,189	1,471,615
Junior subordinated debentures	12,155	9,802
Fair Value [Member] \| Level 1 [Member]
Financial assets [Abstract]
Cash and cash equivalents	32,145	25,399
Interest-bearing deposit	75,428	80,514
Investment securities available for sale	0	0
FHLB stock	7,441	7,576
Loans held for sale	0	0
Non-covered loans	0	0
Covered loans	0	0
Bank owned life insurance	17,704	17,513
FDIC indemnification asset	0	0
Financial liabilities [Abstract]
Deposits	0	0
Junior subordinated debentures	0	0
Fair Value [Member] \| Level 2 [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Interest-bearing deposit	0	0
Investment securities available for sale	372,968	295,955
FHLB stock	0	0
Loans held for sale	18,043	22,421
Non-covered loans	0	0
Covered loans	0	0
Bank owned life insurance	0	0
FDIC indemnification asset	0	0
Financial liabilities [Abstract]
Deposits	0	0
Junior subordinated debentures	0	0
Fair Value [Member] \| Level 3 [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Interest-bearing deposit	0	0
Investment securities available for sale	0	0
FHLB stock	0	0
Loans held for sale	0	0
Non-covered loans	858,660	821,964
Covered loans	234,396	304,145
Bank owned life insurance	0	0
FDIC indemnification asset	22,630	41,041
Financial liabilities [Abstract]
Deposits	1,468,189	1,471,615
Junior subordinated debentures	$ 12,155	$ 9,802

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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-Name Emerging Issues Task Force (EITF)

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Amount of subordinated debt obligations (also known as subordinated loan, subordinated bond, subordinated debenture or junior debt) which has a priority ranking after other debts in a dissolution, measured at fair value.

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 32

-Subparagraph a

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-Number AAG-DEP

-Paragraph 20

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