XML 43 R61.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Past Due and Nonaccrual Loans (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | $ 2,956 | $ 4,090
90 or More Days Past Due | 6,268 | 3,755
90 or More Days Past Due and Still Accruing | 190 | 170
Nonaccruals (Including Impaired Nonaccruals) | 6,584 | 13,021
Real Estate Construction [Member] | Construction residential [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 45 |
90 or More Days Past Due |  | 123
Nonaccruals (Including Impaired Nonaccruals) |  | 123
Real Estate Construction [Member] | Construction other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 45 | 31
90 or More Days Past Due |  | 89
Nonaccruals (Including Impaired Nonaccruals) |  | 3,109
Consumer Real Estate [Member] | Equity Lines [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due |  | 22
90 or More Days Past Due |  | 30
90 or More Days Past Due and Still Accruing |  | 30
Nonaccruals (Including Impaired Nonaccruals) |  | 98
Consumer Real Estate [Member] | Residential closed end first liens [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 903 | 1,507
90 or More Days Past Due | 252 | 605
90 or More Days Past Due and Still Accruing | 128 | 126
Nonaccruals (Including Impaired Nonaccruals) | 308 | 801
Consumer Real Estate [Member] | Residential closed end junior liens [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 10 | 121
90 or More Days Past Due |  | 39
Nonaccruals (Including Impaired Nonaccruals) |  | 120
Consumer Real Estate [Member] | Investor-owned residential real estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 422 |
90 or More Days Past Due | 91 |
Nonaccruals (Including Impaired Nonaccruals) | 91 |
Commercial Real Estate Loans [Member] | Multifamily real estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 430 | 671
90 or More Days Past Due | 3,278 | 261
Nonaccruals (Including Impaired Nonaccruals) | 3,278 | 4,624
Commercial Real Estate Loans [Member] | Commercial real estate, owner occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 604 | 1,113
90 or More Days Past Due | 2,519 |
Nonaccruals (Including Impaired Nonaccruals) | 2,756 | 3,536
Commercial Real Estate Loans [Member] | Commercial real estate, other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 32 | 40
90 or More Days Past Due |  | 2,089
Commercial Non Real Estate [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 196 | 291
90 or More Days Past Due | 43 | 505
Nonaccruals (Including Impaired Nonaccruals) | 128 | 561
Consumer Non Real Estate [Member] | Credit Card Receivable [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 3 | 20
90 or More Days Past Due | 13 | 4
90 or More Days Past Due and Still Accruing | 13 | 4
Consumer Non Real Estate [Member] | Automobile [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 217 | 142
90 or More Days Past Due | 26 | 10
90 or More Days Past Due and Still Accruing | 2 | 10
Nonaccruals (Including Impaired Nonaccruals) | 23 | 49
Consumer Non Real Estate [Member] | Other Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30 – 89 Days Past Due | 49 | 132
90 or More Days Past Due | 46 |
90 or More Days Past Due and Still Accruing | $ 47 |

X
- Definition Financing receivables that are less than 90 days past due but more than 29 days past due. + References No definition available. + Details
Name: | nksh_FinancingReceivableRecordedInvestment30To89DaysPastDue
Namespace Prefix: | nksh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivables that are equal to or greater than 90 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration