XML 55 R29.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Securities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract] |
Available-for-sale Securities [Table Text Block] | The estimated fair value of available-for-sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:
|  | (Dollars in thousands) |
|  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Cost |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
December 31, 2018 |  | Basis |  |  | Gains |  |  | Losses |  |  | Value |
Money market fund |  | $ | 2,480 |  |  | $ | - |  |  | $ | - |  |  | $ | 2,480 |
U.S. government sponsored entities |  |  | 7,997 |  |  |  | 28 |  |  |  | (131 | ) |  |  | 7,894 |
Collateralized mortgage obligations and |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
residential mortgage-backed securities |  |  | 137,834 |  |  |  | 135 |  |  |  | (2,688 | ) |  |  | 135,281 |
Municipal securities |  |  | 93,516 |  |  |  | 1,072 |  |  |  | (524 | ) |  |  | 94,064 |
Collateralized debt obligations |  |  | 3,481 |  |  |  | - |  |  |  | (1,432 | ) |  |  | 2,049 |
Total securities available-for-sale |  | $ | 245,308 |  |  | $ | 1,235 |  |  | $ | (4,775 | ) |  | $ | 241,768 |
|  | (Dollars in thousands) |
|  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Cost |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
December 31, 2017 |  | Basis |  |  | Gains |  |  | Losses |  |  | Value |
Money market fund |  | $ | 476 |  |  | $ | - |  |  | $ | - |  |  | $ | 476 |
U.S. government sponsored entities |  |  | 3,996 |  |  |  | - |  |  |  | (106 | ) |  |  | 3,890 |
Collateralized mortgage obligations and |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
residential mortgage-backed securities |  |  | 134,224 |  |  |  | 170 |  |  |  | (1,456 | ) |  |  | 132,938 |
Municipal securities |  |  | 100,088 |  |  |  | 3,709 |  |  |  | (50 | ) |  |  | 103,747 |
Collateralized debt obligations |  |  | 4,835 |  |  |  | - |  |  |  | (1,396 | ) |  |  | 3,439 |
Total securities available-for-sale |  | $ | 243,619 |  |  | $ | 3,879 |  |  | $ | (3,008 | ) |  | $ | 244,490 |
Schedule of Contractual Maturities of Available-for-sale Debt Securities [Table Text Block] | The estimated fair value of available-for-sale securities and carrying amount, if different, at December 31, 2018 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately. Tax-equivalent yields were calculated using the 2018 tax rate.
|  | (Dollars in thousands) |
|  | Available-for-sale |
|  | Estimated |  |  |  |
|  | Fair |  |  | Tax-Equivalent |
December 31, 2018 |  | Value |  |  | Yield (%) |
Due in one year or less |  | $ | 2,821 |  |  |  | 5.90 |
Due from one to five years |  |  | 7,698 |  |  |  | 3.37 |
Due from five to ten years |  |  | 16,882 |  |  |  | 4.02 |
Due over ten years |  |  | 79,086 |  |  |  | 4.10 |
Collateralized mortgage obligations and |  |  |  |  |  |  |  |
residential mortgage-backed securities |  |  | 135,281 |  |  |  | 2.78 |
Total |  | $ | 241,768 |  |  |  | 3.35 |
Schedule of Realized Gain (Loss) [Table Text Block] | Sales of available-for-sale securities were as follows:
|  | (Dollars in thousands) |
|  | December 31, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
Proceeds |  | $ | 34,545 |  |  | $ | 56,347 |
Gross gains |  |  | 1,216 |  |  |  | 972 |
Gross losses |  |  | (16 | ) |  |  | (112 | )
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Accumulated other comprehensive income/(loss) balances, net of tax, related to available-for-sale securities, were as follows:
|  | (Dollars in thousands) |
|  | Unrealized gain/(loss) |
Ending balance, December 31, 2017 |  | $ | 684 |
Current period change |  |  | (3,480 | )
Ending balance, December 31, 2018 |  | $ | (2,796 | )
Unrealized Gain (Loss) on Investments [Table Text Block] | Securities with unrealized losses at December 31, 2018 and 2017 not recognized in income are as follows:
|  | (Dollars in thousands) |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Estimated |  |  |  |  |  | Estimated |  |  |  |  |  | Estimated |  |  |  |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
December 31, 2018 |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. government sponsored entities |  | $ | - |  |  | $ | - |  |  | $ | 3,866 |  |  | $ | (131 | ) |  | $ | 3,866 |  |  | $ | (131 | )
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 28,388 |  |  |  | (304 | ) |  |  | 89,234 |  |  |  | (2,384 | ) |  |  | 117,622 |  |  |  | (2,688 | )
Municipal securities |  |  | 22,678 |  |  |  | (367 | ) |  |  | 3,495 |  |  |  | (157 | ) |  |  | 26,173 |  |  |  | (524 | )
Collateralized debt obligations |  |  | - |  |  |  | - |  |  |  | 2,049 |  |  |  | (1,432 | ) |  |  | 2,049 |  |  |  | (1,432 | )
Total temporarily impaired |  | $ | 51,066 |  |  | $ | (671 | ) |  | $ | 98,644 |  |  | $ | (4,104 | ) |  | $ | 149,710 |  |  | $ | (4,775 | )
Number of securities |  |  |  |  |  |  | 52 |  |  |  |  |  |  |  | 75 |  |  |  |  |  |  |  | 127 |
|  | (Dollars in thousands) |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Estimated |  |  |  |  |  | Estimated |  |  |  |  |  | Estimated |  |  |  |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
December 31, 2017 |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. government sponsored entities |  | $ | - |  |  | $ | - |  |  | $ | 3,890 |  |  | $ | (106 | ) |  | $ | 3,890 |  |  | $ | (106 | )
Collateralized mortgage obligations and residential mortgage-backed securities |  |  | 66,917 |  |  |  | (511 | ) |  |  | 37,003 |  |  |  | (945 | ) |  |  | 103,920 |  |  |  | (1,456 | )
Municipal securities |  |  | 1,790 |  |  |  | (3 | ) |  |  | 1,815 |  |  |  | (47 | ) |  |  | 3,605 |  |  |  | (50 | )
Collateralized debt obligations |  |  | - |  |  |  | - |  |  |  | 3,439 |  |  |  | (1,396 | ) |  |  | 3,439 |  |  |  | (1,396 | )
Total temporarily impaired |  | $ | 68,707 |  |  | $ | (514 | ) |  | $ | 46,147 |  |  | $ | (2,494 | ) |  | $ | 114,854 |  |  | $ | (3,008 | )
Number of securities |  |  |  |  |  |  | 40 |  |  |  |  |  |  |  | 37 |  |  |  |  |  |  |  | 77 |

X
- References No definition available. + Details
Name: | nwin_ScheduleOfContractualMaturitiesOfAvailableForSaleDebtSecuritiesTableTextBlock
Namespace Prefix: | nwin_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
Name: | us-gaap_ScheduleOfRealizedGainLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
Name: | us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration