0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Basis of Financial Reporting link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Bonds and Notes Payable link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Derivative Financial Instruments link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Investments and Notes Receivable link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Business Combination link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Intangible Assets link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Goodwill link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Bank Deposits link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Earnings per Common Share link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Disaggregated Revenue link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Reinsurance link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Major Customer link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Fair Value link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of Financial Reporting (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Bonds and Notes Payable (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Derivative Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Investments and Notes Receivable (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Business Combination (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Goodwill (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Bank Deposits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Earnings per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Segment Reporting (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Disaggregated Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Reinsurance (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Fair Value (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Schedule of Loans Receivable and Accrued Interest Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Schedule of Allowance for Loan Losses as a Percentage of the Ending Balance (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Schedule of Allowance for Loan Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Schedule of Net Charge-offs as a Percentage of Average Loans (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Schedule of Unfunded Loan Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Schedule of Loan Status and Delinquencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Schedule of Nelnet Bank's Private Education Loans by FICO Score at Origination (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Loans and Accrued Interest Receivable and Allowance for Loan Losses - Schedule of Loans by Year of Origination (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Bonds and Notes Payable - Schedule of Outstanding Debt Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Bonds and Notes Payable - Schedule of Outstanding Lines of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Bonds and Notes Payable - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Derivative Financial Instruments - Schedule of Outstanding Basis Swap (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Derivative Financial Instruments - Schedule of Interest Rate Swaps, Floor Income Hedge (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Derivative Financial Instruments - Schedule of Interest Rate Swaps (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Derivative Financial Instruments - Schedule of Fair Value of Asset and Liability Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Derivative Financial Instruments - Derivative Impact on Statement of Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Derivative Financial Instruments - Derivative Impact on Statement of Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Investments and Notes Receivable - Schedule of Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Investments and Notes Receivable - Schedule of Investments Classified by Contractual Maturity Date (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Investments and Notes Receivable - Schedule of Unrealized Positions for Held-to-Maturity Investments and Beneficial Interest in Loan Securitizations (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Investments and Notes Receivable - Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Investments and Notes Receivable - Schedule of Gross Proceeds and Gross Realized Gains and Losses of Available-for-Sale Asset-Backed Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Investments and Notes Receivable - Schedule of Unrealized Gains and Losses related to Equity Securities and Funds Measured at Net Asset Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Business Combination - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Business Combination - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Intangible Assets - Schedule of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Intangible Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Intangible Assets - Schedule of Intangible Assets Future Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Bank Deposits - Schedule of Interest-Bearing Deposits (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Bank Deposits - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Bank Deposits - Schedule of Certificates of Deposit Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Earnings per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Segment Reporting - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Segment Reporting - Schedule of Reportable Operating Segments Reconciled to Consolidated Financial Statements (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Disaggregated Revenue - Schedule of Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Disaggregated Revenue - Schedule of Components of Other Income (Expenses) (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Reinsurance - Schedule Of Reinsurance Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Reinsurance - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Major Customer (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Fair Value - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Fair Value - Schedule of Fair Value of Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink