Fair Value Disclosures - Estimated Fair Value of Company's Financial Assets and Financial Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financial assets:
Cash and cash equivalents, Carrying Amount	$ 160,888	$ 85,797	$ 15,784	$ 57,396
Held to maturity securities, Amortized Cost	745us-gaap_HeldToMaturitySecurities	743us-gaap_HeldToMaturitySecurities
Loans not previously presented, net, Carrying Amount	997,035	877,454
FHLB and Federal Reserve Bank stock, Carrying Amount	4,903	5,802
Cash and cash equivalents, Fair Value	160,888	85,797
Securities - Held to maturity, Fair value	750	745
Loans not previously presented, net, Fair Value	1,001,548	884,307
Accrued interest receivable, Fair Value	3,727	3,748
Financial liabilities:
Deposits, Carrying Amount	1,165,229us-gaap_Deposits	1,044,854us-gaap_Deposits
Customer repurchase agreements, Carrying Amount	9,282	11,330
Federal Home Loan Bank advances, Carrying Amount	3,000	21,000
Senior secured note, Carrying Amount		12,573us-gaap_SeniorNotes
Junior subordinated debentures, Carrying Amount	24,423	24,171
Deposits, Fair Value	1,167,479us-gaap_DepositsFairValueDisclosure	1,046,226us-gaap_DepositsFairValueDisclosure
Customer repurchase agreements, Fair Value	9,282	11,330
Federal Home Loan Bank advances, Fair Value	3,000	21,000
Senior secured note, Fair Value		12,379
Junior subordinated debentures, Fair Value	24,423	24,171
Accrued interest payable, Fair Value	971	2,426
Level 1
Financial assets:
Cash and cash equivalents, Fair Value	160,888	85,797
Level 2
Financial assets:
Securities - Held to maturity, Fair value	750	745
Accrued interest receivable, Fair Value	3,727	3,748
Financial liabilities:
Deposits, Fair Value	1,167,479	1,046,226
Customer repurchase agreements, Fair Value	9,282	11,330
Federal Home Loan Bank advances, Fair Value	3,000	21,000
Senior secured note, Fair Value		12,379
Junior subordinated debentures, Fair Value	24,423	24,171
Accrued interest payable, Fair Value	971	2,426
Level 3
Financial assets:
Loans not previously presented, net, Fair Value	1,001,548	883,656
Carrying Amount
Financial assets:
Cash and cash equivalents, Carrying Amount	160,888	85,797
Held to maturity securities, Amortized Cost	745	743
Loans not previously presented, net, Carrying Amount	995,668	876,803
FHLB and Federal Reserve Bank stock, Carrying Amount	4,903	5,802
Accrued interest receivable, Carrying Amount	3,727	3,748
Financial liabilities:
Deposits, Carrying Amount	1,165,229	1,044,854
Customer repurchase agreements, Carrying Amount	9,282	11,330
Federal Home Loan Bank advances, Carrying Amount	3,000	21,000
Senior secured note, Carrying Amount		12,573
Junior subordinated debentures, Carrying Amount	24,423	24,171
Accrued interest payable, Carrying Amount	$ 971	$ 2,426

Accrued interest payable fair value disclosure.

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Accrued interest receivable fair value disclosure.

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Junior subordinated notes fair value disclosure.

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Senior secured note fair value disclosure.

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of investments in debt securities classified as held-to-maturity.

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Amount of interest payable on debt, including, but not limited to, trade payables.

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price.

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Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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