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Note 12 - Minimum Regulatory Capital Requirement | 12 Months Ended
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Dec. 31, 2013
Disclosure Text Block [Abstract] |
Regulatory Capital Requirements under Banking Regulations [Text Block] | Note 12: Minimum Regulatory Capital Requirement The Company (on a consolidated basis) and its subsidiary bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possible additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s and the bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities, and certain off balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies. Quantitative measures established by regulation to ensure capital adequacy require the Company and the bank to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of December 31, 2013 and 2012, that the Company and the bank meet all capital adequacy requirements to which they are subject. As of December 31, 2013, the most recent notifications from the Office of the Comptroller of the Currency categorized the bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios, as set forth in the following tables. There are no conditions or events since these notifications that management believes have changed the bank’s category. The Company’s and the bank’s actual capital amounts and ratios as of December 31, 2013 and 2012 are also presented in the following tables.
|  | Actual |  |  | Minimum Capital Requirement |  |  | Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
December 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NBI consolidated |  | $ | 162,763 |  |  |  | 23.6 | % |  | $ | 55,192 |  |  |  | 8.00 | % |  | N/A |  |  | N/A |
NBB |  |  | 160,049 |  |  |  | 23.3 | % |  |  | 54,980 |  |  |  | 8.00 | % |  | $ | 68,726 |  |  |  | 10.00 | %
Tier 1 capital (to risk weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NBI consolidated |  | $ | 154,536 |  |  |  | 22.4 | % |  | $ | 27,596 |  |  |  | 4.00 | % |  | N/A |  |  | N/A |
NBB |  |  | 151,822 |  |  |  | 22.1 | % |  |  | 27,490 |  |  |  | 4.00 | % |  | $ | 41,235 |  |  |  | 6.00 | %
Tier 1 capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NBI consolidated |  | $ | 154,536 |  |  |  | 14.1 | % |  | $ | 43,946 |  |  |  | 4.00 | % |  | N/A |  |  | N/A |
NBB |  |  | 151,822 |  |  |  | 13.8 | % |  |  | 43,904 |  |  |  | 4.00 | % |  | $ | 54,880 |  |  |  | 5.00 | %
|  | Actual |  |  | Minimum Capital Requirement |  |  | Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NBI consolidated |  | $ | 151,824 |  |  |  | 22.4 | % |  | $ | 54,225 |  |  |  | 8.00 | % |  | N/A |  |  | N/A |
NBB |  |  | 148,684 |  |  |  | 22.0 | % |  |  | 53,984 |  |  |  | 8.00 | % |  | $ | 67,481 |  |  |  | 10.00 | %
Tier 1 capital (to risk weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NBI consolidated |  | $ | 143,472 |  |  |  | 21.2 | % |  | $ | 27,113 |  |  |  | 4.00 | % |  | N/A |  |  | N/A |
NBB |  |  | 140,335 |  |  |  | 20.8 | % |  |  | 26,992 |  |  |  | 4.00 | % |  | $ | 40,488 |  |  |  | 6.00 | %
Tier 1 capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NBI consolidated |  | $ | 143,472 |  |  |  | 13.3 | % |  | $ | 43,010 |  |  |  | 4.00 | % |  | N/A |  |  | N/A |
NBB |  |  | 140,335 |  |  |  | 13.1 | % |  |  | 42,973 |  |  |  | 4.00 | % |  | $ | 53,716 |  |  |  | 5.00 | %

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- Definition The entire disclosure for banks, savings institutions, and credit unions, for regulatory capital requirements imposed by the Federal Reserve System (FRB), the Federal Deposit Insurance Corporation (FDIC), the Office of Thrift Supervision (OTS) or for any state imposed capital requirements, as applicable. The disclosure may include (1) a description of regulatory capital requirements (a) for capital adequacy purposes and (b) established by the prompt corrective action provisions of Section 38 of the Federal Depository Insurance Act; (2) the actual or possible material effects of noncompliance with such requirements; (3) whether the entity is in compliance with the regulatory capital requirements including (a) required and actual ratios and amounts of Tier 1 leverage, Tier 1 risk-based, and total risk-based capital, tangible capital (for savings institutions), and Tier 3 capital for market risk (for certain banks and bank holding companies), (b) factors that may significantly affect capital adequacy; (4) the prompt corrective action category in which the entity was classified as of its most recent notification; (5) whether management believes any conditions or events since notification have changed the entity's category. Also may include additional information that might be disclosed in situations where substantial doubt about the entity's ability to continue as a going concern for a reasonable period of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1D -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958573-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1E -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958574-112826 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1F -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958575-112826 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958569-112826 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1G -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958577-112826 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1C -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958572-112826 + Details
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