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Fair Value of Financial Instruments - Summary of Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Assets |  |
Cash and due from banks | $ 48,650 | $ 43,476
Investment securities, held to maturity | 187,629 | 165,767
Loans held for sale | 7,917 | 6,143
Loans excluding loan level hedges, net | 1,739,713 | 1,365,885
Stock in FHLB and FRB | 13,823 | 11,348
Interest receivable | 10,535 | 8,246
Liabilities |  |
Non-interest bearing deposits | 335,955 | 267,667
Subordinated debentures | 32,797 | 32,642
Interest payable | 507 | 497
Carrying Amount [Member] |  |
Assets |  |
Cash and due from banks | 48,650 | 43,476
Investment securities, held to maturity | 187,629 | 165,767
Loans held for sale | 7,917 | 6,143
Loans excluding loan level hedges, net | 1,619,125 | 1,260,608
Stock in FHLB and FRB | 13,823 | 11,348
Interest receivable | 10,535 | 8,246
Liabilities |  |
Non-interest bearing deposits | 335,955 | 267,667
Interest-bearing deposits | 1,544,198 | 1,214,652
Borrowings | 449,347 | 351,198
Subordinated debentures | 32,797 | 32,642
Interest payable | 507 | 497
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Assets |  |
Cash and due from banks | 48,650 | 43,476
Liabilities |  |
Non-interest bearing deposits | 335,955 | 267,667
Significant Other Observable Inputs (Level 2) [Member] |  |
Assets |  |
Investment securities, held to maturity | 193,703 |
Stock in FHLB and FRB | 13,823 | 11,348
Interest receivable | 10,535 | 8,246
Liabilities |  |
Interest-bearing deposits | 1,461,314 | 1,158,912
Borrowings | 441,547 | 348,597
Subordinated debentures | 32,996 | 32,669
Interest payable | 507 | 497
Significant Unobservable Inputs (Level 3) [Member] |  |
Assets |  |
Investment securities, held to maturity |  | 169,904
Loans held for sale | 7,917 | 6,143
Loans excluding loan level hedges, net | $ 1,703,506 | $ 1,295,133

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- Definition For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.1) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1, 2, 3 -Article 9 + Details
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