2.4.0.8133 - Disclosure - REGULATORY MATTERS (Details Textual)truefalseIn Millions, unless otherwise specifiedfalse1false USDfalsefalse$PAsOn06_30_2013http://www.sec.gov/CIK0001493552instant2013-06-30T00:00:000001-01-01T00:00:00pureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3nvsl_RegulatoryMattersLineItemsnvsl_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Regulatory Matters [Line Items]2false 4us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truetruefalse0.09000.0900falsefalsefalsenum:percentItemTypepureThe minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(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 1B -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958570-112826 false0Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets3false 4us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssetsus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.13000.1300falsefalsefalsenum:percentItemTypepureTier 1 capital divided by risk weighted assets as defined by regulations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 false0Tier One Risk Based Capital to Risk Weighted Assets4false 4us-gaap_CapitalToRiskWeightedAssetsus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.15540.1554falsefalsefalsenum:percentItemTypepureTotal Capital divided by risk weighted assets as defined in the regulations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 false0Capital to Risk Weighted Assets5false 4nvsl_LiquidAssetsnvsl_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse75000007.5USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresent liquid assets.No definition available.false2Liquid Assets6false 4us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.11340.1134falsefalsefalsenum:percentItemTypepureThe minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(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 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