XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.23.3

Equity (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Dec. 31, 2022 | Apr. 19, 2021
Preferred Stock, Shares Authorized | 20,000,000 |  | 20,000,000 | 20,000,000 |
Preferred Stock, Shares Outstanding | 902,500 |  | 902,500 | 1,302,500 |
Preferred Stock, Par or Stated Value Per Share | $ 0.01 |  | $ 0.01 | $ 0.01 |
Equity Units Stock Purchase Contract Liability Payments |  |  | $ 50,100,000 |  |
Preferred Stock Shares Redeemed | 0 |  | 0 |  |
Series A Corporate Units |  |  |  |  |
Shares Issued, Price Per Share |  |  |  |  | $ 100
Shares To Be Issued Under Stock Purchase Contracts |  |  | 35,200,000 |  |
Series C Preferred Stock |  |  |  |  |
Shares To Be Issued Under Stock Purchase Contracts |  |  | 35,200,000 |  |
Series A Corporate Units |  |  |  |  |
Shares Issued, Price Per Share |  |  |  |  | 100
At The Market Program |  |  |  |  |
Common Stock Aggregate Sale Price |  |  | $ 750,000,000 |  |
ATM Program Equity Remaining Available for Issuance |  |  | $ 300,000,000 |  |
Series A Preferred Stock |  |  |  |  |
Preferred Stock, Shares Outstanding | 0 |  | 0 |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.01 |  | $ 0.01 |  |
Preferred Stock, Amount of Preferred Dividends in Arrears |  | $ 6,700,000 |  |  |
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears |  | $ 16.63 |  |  |
Preferred Stock Shares Redeemed |  |  | 400,000 |  |
Preferred Stock, Redemption Amount | $ 400,000,000 |  | $ 400,000,000 |  |
Series B Preferred Stock |  |  |  |  |
Preferred Stock, Shares Outstanding | 20,000 |  | 20,000 |  |
Preferred Stock, Amount of Preferred Dividends in Arrears | $ 1,400,000 | $ 1,400,000 |  |  |
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears | $ 72.23 | $ 72.23 |  |  |
Series B-1 Preferred Stock |  |  |  |  |
Preferred Stock, Shares Outstanding | 20,000 |  | 20,000 |  |
Series C Preferred Stock |  |  |  |  |
Preferred Stock, Shares Outstanding | 862,500 |  | 862,500 |  |
Preferred Stock, Par or Stated Value Per Share |  |  |  |  | $ 0.01
Undivided Beneficial Ownership Interest, Percent |  |  |  |  | 10.00%

X
- Definition ATM Program Equity Remaining Available for Issuance + References No definition available. + Details
Name: | nix_ATMProgramEquityRemainingAvailableforIssuance
Namespace Prefix: | nix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Common Stock Aggregate Sale Price + References No definition available. + Details
Name: | nix_CommonStockAggregateSalePrice
Namespace Prefix: | nix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Equity Units Stock Purchase Contract Liability Payments + References No definition available. + Details
Name: | nix_EquityUnitsStockPurchaseContractLiabilityPayments
Namespace Prefix: | nix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Preferred Stock Shares Redeemed + References No definition available. + Details
Name: | nix_PreferredStockSharesRedeemed
Namespace Prefix: | nix_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shares To Be Issued Under Stock Purchase Contracts + References No definition available. + Details
Name: | nix_SharesToBeIssuedUnderStockPurchaseContracts
Namespace Prefix: | nix_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Undivided Beneficial Ownership Interest, Percent + References No definition available. + Details
Name: | nix_UndividedBeneficialOwnershipInterestPercent
Namespace Prefix: | nix_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate amount of cumulative preferred dividends in arrears. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-5 + Details
Name: | us-gaap_PreferredStockAmountOfPreferredDividendsInArrears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-13 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Per share amount of cumulative preferred dividends in arrears. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-5 + Details
Name: | us-gaap_PreferredStockPerShareAmountsOfPreferredDividendsInArrears
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The redemption (or callable) amount of currently redeemable preferred stock. Includes amounts representing dividends not currently declared or paid but which will be payable under the redemption features or for which ultimate payment is solely within the control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-11 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.27(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_PreferredStockRedemptionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(16)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.6-05(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(4)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(16)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_PreferredStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_CapitalUnitsByClassAxis=nix_SeriesACorporateUnits
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalUnitsByClassAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalUnitsByClassAxis=nix_SeriesACorporateUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=nix_AtTheMarketProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nix_SeriesB1PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |