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Note 7 - Intangible Assets (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Oct. 31, 2015 | Dec. 31, 2014 | Oct. 31, 2014 | Aug. 31, 2009 | Aug. 31, 2008
Amortization of Intangible Assets |  | $ 1,700 |  | $ 1,500 |  |  | $ 743 |  |  |
Goodwill | [1] | 104,168 |  | 104,168 |  |  |  |  |  |
Goodwill, Period Increase (Decrease) |  |  | [1] | (257) | [1] | $ 257 |  |  |  |
Core Deposits [Member] |  |  |  |  |  |  |  |  |  |
Amortization of Intangible Assets |  | 1,200 |  | 1,200 |  |  |  |  |  |
Finite-Lived Intangible Assets, Net |  | 2,779 |  | $ 3,986 |  |  |  |  |  |
Fidelity [Member] |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | $ 2,200 | $ 360
Fidelity [Member] | Core Deposits [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | 209 |  |  |  |  |  |  |  | $ 2,300
Virginia Heritage Bank [Member] |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 102,300 |  |
Goodwill, Period Increase (Decrease) |  |  |  |  |  | $ (257) |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  |  |  |  |  | 4,600 |  |
Virginia Heritage Bank [Member] | Core Deposits [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | $ 2,600 |  |  |  |  |  | $ 4,600 |  |
[1] | The Company recorded an initial amount of unidentified intangible (goodwill) incident to the acquisition of Fidelity of approximately $360 thousand. Based on allowable adjustments through August 31, 2009, the unidentified intangible (goodwill) amounted to approximately $2.2 million. The Company recorded an initial amount of unidentified intangible (goodwill) incident to the acquisition of Virginia Heritage of approximately $102.3 million. Based on allowable adjustments through October 31, 2015, the unidentified intangible (goodwill) was reduced by $257 thousand.

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=73531372&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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