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Loans - Recorded Investment of Individual Loan Categories (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | $ 1,745,340 | $ 1,377,472 |  |
Net loans | 1,730,806 | 1,360,971 |  |
Interest Due | 5,115 | 3,832 |  |
Deferred Fees / (Costs) | 3,792 | 1,082 |  |
Recorded Investment | 1,754,247 | 1,382,386 |  |
Recorded Investment | 1,739,713 | 1,365,885 |  |
Allowance for loan losses | (14,534) | (16,501) | $ (15,992) | $ (18,270)
Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 802,792 | 673,059 |  |
Interest Due | 2,207 | 1,583 |  |
Deferred Fees / (Costs) | 2,203 | 1,255 |  |
Recorded Investment | 807,202 | 675,897 |  |
Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 579,367 | 383,182 |  |
Interest Due | 1,789 | 1,238 |  |
Deferred Fees / (Costs) | 2,470 | 599 |  |
Recorded Investment | 583,626 | 385,019 |  |
Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 363,181 | 321,231 |  |
Interest Due | 1,119 | 1,011 |  |
Deferred Fees / (Costs) | (881) | (772) |  |
Recorded Investment | 363,419 | 321,470 |  |
Owner Occupied Real Estate [Member] | Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 268,281 | 228,380 |  |
Interest Due | 613 | 385 |  |
Deferred Fees / (Costs) | 1,328 | 680 |  |
Recorded Investment | 270,222 | 229,445 |  |
Non Owner Occupied Real Estate [Member] | Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 326,399 | 297,299 |  |
Interest Due | 306 | 309 |  |
Deferred Fees / (Costs) | 497 | 506 |  |
Recorded Investment | 327,202 | 298,114 |  |
Residential Spec Homes [Member] | Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 5,018 | 2,027 |  |
Interest Due | 9 | 2 |  |
Deferred Fees / (Costs) | 17 |  |  |
Recorded Investment | 5,044 | 2,029 |  |
Development & Spec Land Loans [Member] | Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 18,183 | 12,097 |  |
Interest Due | 33 | 28 |  |
Deferred Fees / (Costs) | 26 | 30 |  |
Recorded Investment | 18,242 | 12,155 |  |
Commercial and Industrial [Member] | Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 184,911 | 133,256 |  |
Interest Due | 1,246 | 859 |  |
Deferred Fees / (Costs) | 335 | 39 |  |
Recorded Investment | 186,492 | 134,154 |  |
Residential Mortgage [Member] | Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 414,924 | 242,521 |  |
Interest Due | 1,275 | 737 |  |
Deferred Fees / (Costs) | 2,470 | 599 |  |
Recorded Investment | 418,669 | 243,857 |  |
Residential Construction [Member] | Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 19,751 | 11,505 |  |
Interest Due | 34 | 21 |  |
Recorded Investment | 19,785 | 11,526 |  |
Mortgage Warehousing [Member] | Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 144,692 | 129,156 |  |
Interest Due | 480 | 480 |  |
Recorded Investment | 145,172 | 129,636 |  |
Direct Installment [Member] | Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 54,341 | 40,137 |  |
Interest Due | 168 | 129 |  |
Deferred Fees / (Costs) | (359) | (375) |  |
Recorded Investment | 54,150 | 39,891 |  |
Direct Installment Purchased [Member] | Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 153 | 219 |  |
Recorded Investment | 153 | 219 |  |
Indirect Installment [Member] | Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 151,523 | 141,868 |  |
Interest Due | 323 | 314 |  |
Deferred Fees / (Costs) |  | (163) |  |
Recorded Investment | 151,846 | 142,019 |  |
Home Equity Loan [Member] | Consumer [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loan Balance | 157,164 | 139,007 |  |
Interest Due | 628 | 568 |  |
Deferred Fees / (Costs) | (522) | (234) |  |
Recorded Investment | $ 157,270 | $ 139,341 |  |

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