Acquired SJB Assets and FDIC Loss Sharing Asset - Summary of PCI Loans and Lease Finance Receivables (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Real estate:
Less: Allowance for PCI loan losses	$ 0	$ 0
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	14,605	19,047
SBA	1,110	1,414
Real estate:
Commercial real estate	109,350	141,141
Construction	0	644
SFR mortgage	205	313
Dairy & livestock and agribusiness	4,890	6,000
Municipal lease finance receivables	0	0
Consumer and other loans	3,336	4,545
Gross PCI loans	133,496	173,104
Less: Purchase accounting discount	(7,129)	(12,789)
Gross PCI loans, net of discount	126,367	160,315
Less: Allowance for PCI loan losses	0	0
Net PCI loans	$ 126,367	$ 160,315

Allowance for loan losses purchased credit impaired loans.

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Gross purchased credit impaired loans.

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Gross purchased credit impaired loans net of discount.

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Loans and leases receivable net amount.

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Loans receivable construction.

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The purchase accounting discount associated with loans acquired in an FDIC assisted acquisition.

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No definition available.

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Amount before allowance of loans and leases issued to a unit or agency of a federal, state or local jurisdiction within the country of domicile of the reporting entity. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of consumer mortgage. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes subordinated loans such as home equity lines of credit and loans and leases covered under loss sharing agreements.

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Amount before allowance of consumer loans and leases not otherwise specified in the taxonomy. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of loans issued to commercial and industrial institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes real estate loans and loans covered under loss sharing agreements.

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Amount before allowance of loans issued to agricultural, commercial and industrial, and financial institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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Amount before allowance of mortgage loans on existing land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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Amount before allowance of commercial loans, including, but not limited to, letters of credit, bankers' acceptances, receivables factoring, open account financing, for international trade activities. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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