2.4.0.8148 - Disclosure - DEPOSITS (Details)truefalseIn Thousands, 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$2false USDfalsefalse$PAsOn12_31_2012http://www.sec.gov/CIK0001493552instant2012-12-31T00:00:000001-01-01T00:00:00pureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3nvsl_DepositsLineItemsnvsl_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Deposits [Line Items]2false 4us-gaap_NoninterestBearingDepositLiabilitiesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse7539400075394USD$falsetruefalse2truefalsefalse7030000070300USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 false2Noninterest bearing demand deposits, Amount3true 4us-gaap_InterestBearingDepositLiabilitiesDomesticByComponentAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Interest bearing demand deposits4false 5us-gaap_InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOWus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4083700040837falsefalsefalse2truefalsefalse3896500038965falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of interest-bearing domestic negotiable order of withdrawal (NOW) demand deposit liabilities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 false2Now accounts and money market accounts, Amount5false 5us-gaap_InterestBearingDomesticDepositSavingsus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse119681000119681falsefalsefalse2truefalsefalse117259000117259falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of interest-bearing domestic savings deposit liabilities. 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