Document and Entity Information [Abstract] Document Information [Table] Legal Entity [Axis] Entity [Domain] Represents the Retirement Plan Number 001. E B P 001 [Member] Employees' 401(k) Savings and Investment Plan Document Information [Line Items] Document Type Entity Registrant Name Entity Central Index Key Amendment Flag Statements of Net Assets Available for Benefits EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] Statements of Net Assets Available for Benefits EBP, Asset [Abstract] Assets EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Investments, at fair value Investments at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Investments, at contract value EBP, Receivable [Abstract] Receivables: EBP, Employer Contribution, Receivable Employer contributions EBP, Note Receivable from Participant Notes receivable from participants EBP, Receivable Total receivables EBP, Net Asset Available for Benefit Net assets available for benefits end of year Net assets available for benefits beginning of year Net assets available for benefits Statements of Changes in Net Assets Available for Benefits EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Statements of Changes in Net Assets Available for Benefits EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions to net assets attributed to EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment income: Amount of increase in net asset available for benefit from interest, dividend and capital gain income on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan Change In Net Asset Available For Benefit Increase For Interest, Dividend And Capital Gain Income On Investment Interest, dividends and capital gains EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Net realized and unrealized appreciation in fair value of investments, net EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest income on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Participant contributions EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Rollover contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash Employer contributions EBP, Change in Net Asset Available for Benefit, Increase Total additions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Deductions from net assets attributed to EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefit payments EBP, Change in Net Asset Available for Benefit, Decrease Total deductions EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net increase in net assets Description of Plan EBP, Description of Plan [Table] EBP, Description of Plan [Line Items] Description of Plan EBP, Description of Plan [Text Block] Description of Plan Significant Accounting Policies EBP, Accounting Policy [Table] EBP, Accounting Policy [Line Items] Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Significant Accounting Policies Fair Value Measurements EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Line Items] Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Fair Value Measurements Guaranteed Income Fund - Investment Contract with Insurance Company EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Fully Benefit-Responsive Investment Contract [Line Items] Guaranteed Income Fund - Investment Contract with Insurance Company EBP, Fully Benefit-Responsive Investment Contract [Text Block] Guaranteed Income Fund - Investment Contract with Insurance Company Income Tax Status EBP, Tax Status [Table] EBP, Tax Status [Line Items] Income Tax Status EBP, Tax Status [Text Block] Income Tax Status Risks and Uncertainties EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Line Items] Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Risks and Uncertainties Related Party and Party in Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Line Items] Related Party and Party in Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Related Party and Party in Interest Transactions Schedule H, line 4i-Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Line Items] Schedule H, line 4i-Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Schedule H, line 4i-Schedule of Assets (Held at End of Year) EBP, Basis of Accounting [Policy Text Block] Basis of Accounting EBP, Payment to Participant [Policy Text Block] Payment of Benefits EBP, Note Receivable from Participant [Policy Text Block] Notes Receivable from Participants Disclosure of accounting policy for income recognition and investment valuation held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Investment Valuation and Income Recognition [Policy Text Block] Investment Valuation and Income Recognition EBP, Use of Estimate [Policy Text Block] Use of Estimates EBP, Contribution [Policy Text Block] Contributions EBP, Investment, Fair Value and NAV [Table Text Block] Schedule of Plan's Assets Fair Value Hierarchy Represents the minimum service period for plan eligibility under (employee benefit plan (EBP)). Employee Benefit Plan, Minimum Service Period For Plan Eligibility Minimum service period for Plan eligibility Represents the minimum age criteria for plan eligibility under (employee benefit plan (EBP)). Employee Benefit Plan, Minimum Age For Plan Eligibility Minimum age for Plan eligibility EBP, Participant Contribution, Automatic, Deferral Rate Automatic enrollment deferral rate (as a percent) Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Maximum Percentage of minimum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation. Employee Benefit Plan, Participant Contribution, Pretax, Minimum Annual Compensation to Total Compensation, Percentage Minimum amount of compensation eligible for participant contribution (as a percent) EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Maximum amount of compensation eligible for participant contribution (as a percent) EBP, Employer Contribution, Matching Percentage Matching contributions EBP, Employer Contribution, Participant Compensation Matched, Percentage Match percentage of employees' compensation Represents the maximum amount of employer matching discretionary contribution per participant under an employee stock purchase, savings, or similar employee benefit plan (EBP). Employee Benefit Plan, Maximum Employer Matching Discretionary Contribution Per Participant Maximum employer discretionary contribution per participant Minimum [Member] Minimum EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Note receivable, minimum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Note receivable, maximum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Note receivable, maximum borrowing percentage Term of participant loan of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Note Receivable From Participant, Term Loan term Represents the maximum term of loan if proceeds are used for the purchase of principal residence. Employee Benefit Plan, Note Receivable From Participant Maximum Term If Proceeds Used To Purchase Primary Residence Maximum loan term if proceeds are used for the purchase of principal residence Represents the percentage points added to the prime rate to compute the interest rate on participant loans. Employee Benefit Plan, Note Receivable From Participant, Basis Spread on Prime Rate Basis spread on prime rate (as a percent) EBP, Asset Held for Investment, Participant Loan, Interest Rate Loan interest rate Interest rates on Participant loans receivable Represents the participant age requirement for receiving distribution from account balance of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Participant Age For Receiving Distributions From Account Balance Participant age for receiving distributions from account balance EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total administrative expenses Amount of increase in net asset available for benefit from fee concessions received from administrative service providers, recognized as investment income in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Change in Net Asset Available for Benefit, Increase From Fee Concessions Fee concessions from administrative providers EBP, Note Receivable from Participant, Allowance for Credit Loss Allowance for credit losses Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Mutual Fund [Member] Mutual Funds EBP, Employer, Common Stock [Member] Saga Common Stock Class A common stock Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Level 1 EBP, Tax Ruling, Obtained [true false] Opinion letter obtained EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Domain] Employer of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Employer [Member] Employer EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Dividend income from Company's shares Investment, Identifier [Axis] Entity Tax Identification Number Entity tax identification number EBP, Plan Number Plan number EBP, Asset Held for Investment, Party-in-Interest [true false] EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Current Value EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Participant loans receivable EBP, Asset Held for Investment Total investments