EBP, Related Party and Party-in-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Document Information [Line Items] Document Information [Line Items] American Funds Balanced R6 American Funds Balanced R6 [Member] American Funds Balanced R6 Fidelity Freedom Index 2035 IPR Fidelity Freedom Index 2035 IPR [Member] Fidelity Freedom Index 2035 IPR John Hancock Disciplined Value Mid Cap Fund John Hancock Disciplined Value Mid Cap Fund [Member] John Hancock Disciplined Value Mid Cap Fund Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] EBP, Participant Contribution, Receivable EBP, Participant Contribution, Receivable EBP, Description of Plan and Accounting Change [Abstract] EBP, Allocation Status [Domain] EBP, Allocation Status [Domain] EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Investment Type [Axis] Investment Type [Axis] Fidelity Blue Chip Growth K6 Fidelity Blue Chip Growth K6 [Member] Fidelity Blue Chip Growth K6 EBP, Form 5500 Caption, Receivables, Employer Contributions EBP, Form 5500 Caption, Receivables, Employer Contributions EBP, Investment, Number of Shares EBP, Investment, Number of Shares EBP, Tax Status EBP, Tax Status [Text Block] EBP, Reconciliation to Form 5500, Participant Contribution Receivable, Prior Period EBP, Reconciliation to Form 5500, Participant Contribution Receivable, Prior Period EBP, Reconciliation to Form 5500, Participant Contribution Receivable, Prior Period EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] Fidelity Freedom Index 2020 IPR Fidelity Freedom Index 2020 IPR [Member] Fidelity Freedom Index 2020 IPR EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment Fidelity Freedom Index 2045 IPR Fidelity Freedom Index 2045 IPR [Member] Fidelity Freedom Index 2045 IPR EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] EBP, Form 5500 Caption, Net Assets EBP, Form 5500 Caption, Net Assets EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Text Block] Document Information, Document [Axis] Document Information, Document [Axis] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] Fidelity State Bond Index Fidelity State Bond Index [Member] Fidelity State Bond Index Frost Growth Equity Fund Frost Growth Equity Fund [Member] Frost Growth Equity Fund EBP, Expense EBP, Expense [Policy Text Block] EBP, Form 5500 Caption, Net Income (Loss) EBP, Form 5500 Caption, Net Income (Loss) EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Fidelity Freedom Index 2055 IPR Fidelity Freedom Index 2055 IPR [Member] Fidelity Freedom Index 2055 IPR EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant EBP, Employer Contribution, Receivable EBP, Employer Contribution, Receivable EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover EBP, Reconciliation to Form 5500, Participant Contribution Receivable, Current Period EBP, Reconciliation to Form 5500, Participant Contribution Receivable, Current Period EBP, Reconciliation to Form 5500, Participant Contribution Receivable, Current Period EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] Fidelity Freedom Index 2040 IPR Fidelity Freedom Index 2040 IPR [Member] Fidelity Freedom Index 2040 IPR EBP, Net Asset Available for Benefit EBP, Net Asset Available for Benefit EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Requisite Service Hours 12 Month Period EBP, Requisite Service Hours 12 Month Period EBP, Requisite Service Hours 12 Month Period EBP_Employee Benefit Plan Participant Contribution Pretax Minimum Annual Compensation To Total Compensation Percentage EBP_Employee Benefit Plan Participant Contribution Pretax Minimum Annual Compensation To Total Compensation Percentage EBP_Employee Benefit Plan Participant Contribution Pretax Minimum Annual Compensation To Total Compensation Percentage Fidelity Freedom Index 2070 IPR Fidelity Freedom Index 2070 IPR [Member] Fidelity Freedom Index 2070 IPR EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] Fidelity Freedom Index 2025 IPR Fidelity Freedom Index 2025 IPR [Member] Fidelity Freedom Index 2025 IPR Dodge & Cox Stock I Dodge & Cox Stock I [Member] Dodge & Cox Stock I Fidelity Small Cap Index Fund Fidelity Small Cap Index Fund [Member] Fidelity Small Cap Index Fund Fidelity Freedom Index RET IPR Fidelity Freedom Index RET IPR [Member] Fidelity Freedom Index RET IPR EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Requisite Service Hours Two Year Period EBP, Requisite Service Hours Two Year Period EBP, Requisite Service Hours Two Year Period Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Tax Status [Abstract] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Cover [Abstract] MFS Value Fund R6 MFS Value Fund R6 [Member] MFS Value Fund R6 EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment EBP, Schedule of Asset Held for Investment [Abstract] EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Entity [Domain] Entity [Domain] EBP, Allocation Status [Axis] EBP, Allocation Status [Axis] EBP, Investment, Fair Value and NAV [Abstract] EBP, Employer Contribution, Matching Percentage EBP, Employer Contribution, Matching Percentage EBP, Basis of Accounting EBP, Basis of Accounting [Policy Text Block] Document [Domain] Document [Domain] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Mutual Fund Mutual Fund [Member] EBP, Description of Plan [Table] EBP, Description of Plan [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] EBP, Investment EBP, Investment [Policy Text Block] Amendment Flag Amendment Flag EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Table Text Block] EBP, Change in Net Asset Available for Benefit, Decrease EBP, Change in Net Asset Available for Benefit, Decrease EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Frost Total Return Bond Fund Frost Total Return Bond Fund [Member] Frost Total Return Bond Fund EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Fidelity Emerging Markets Index Fidelity Emerging Markets Index [Member] Fidelity Emerging Markets Index EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Form 5500 Caption, Receivables, Participant Contributions EBP, Form 5500 Caption, Receivables, Participant Contributions EBP, Description of Plan EBP, Description of Plan [Text Block] Fidelity 500 Index Fidelity 500 Index [Member] Fidelity 500 Index Investment, Issuer Name [Axis] Investment, Issuer Name [Axis] EBP, Summary of Accounting Policy EBP, Summary of Accounting Policy [Text Block] EBP, Note Receivable from Participant EBP, Note Receivable from Participant [Policy Text Block] EBP, Change in Net Asset Available for Benefit, Increase EBP, Change in Net Asset Available for Benefit, Increase EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] Entity Central Index Key Entity Central Index Key Fidelity Freedom Index 2050 IPR Fidelity Freedom Index 2050 IPR [Member] Fidelity Freedom Index 2050 IPR EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Legal Entity [Axis] Legal Entity [Axis] EBP, Reconciliation to Form 5500, Employer Contribution Receivable, Prior Period EBP, Reconciliation to Form 5500, Employer Contribution Receivable, Prior Period EBP, Reconciliation to Form 5500, Employer Contribution Receivable, Prior Period Frost Low Duration Bond Fund Frost Low Duration Bond Fund [Member] Frost Low Duration Bond Fund EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] DFA Large CAP International I DFA Large CAP International I [Member] DFA Large CAP International I Investment, Issuer Name [Domain] Investment, Issuer Name [Domain] Victory Sycamore Small Company Opportunity Fund Victory Sycamore Small Company Opportunity Fund [Member] Victory Sycamore Small Company Opportunity Fund Document Type Document Type EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] Cullen/Frost Bankers, Inc. Cullen/Frost Bankers, Inc. [Member] Cullen/Frost Bankers, Inc. Fidelity US Bond Index Fidelity US Bond Index [Member] Fidelity US Bond Index EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Contribution Increments Contribution Increments Contribution Increments EBP, Use of Estimate EBP, Use of Estimate [Policy Text Block] EBP, Note Receivable from Participant EBP, Note Receivable from Participant 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] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Fidelity Money Market Government Institutional Fidelity Money Market Government Institutional [Member] Fidelity Money Market Government Institutional EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Investments [Domain] Investments [Domain] Fidelity Freedom Index 2030 IPR Fidelity Freedom Index 2030 IPR [Member] Fidelity Freedom Index 2030 IPR Document Information [Table] Document Information [Table] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] PIMCO Real Return Fund PIMCO Real Return Fund [Member] PIMCO Real Return Fund EBP 401K EBP 401K [Member] EBP 401K EBP, Risk and Uncertainty [Abstract] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Fidelity Freedom Index 2060 IPR Fidelity Freedom Index 2060 IPR [Member] Fidelity Freedom Index 2060 IPR Entity Registrant Name Entity Registrant Name Common Stock Common Stock [Member] EBP, Tax Status [Table] EBP, Tax Status [Table] Fidelity Freedom Index 2065 IPR Fidelity Freedom Index 2065 IPR [Member] Fidelity Freedom Index 2065 IPR American Beacon Stephens Small Cap Growth Fund R6 American Beacon Stephens Small Cap Growth Fund R6 [Member] American Beacon Stephens Small Cap Growth Fund R6 T Rowe Price Mid Cap Growth Fund T Rowe Price Mid Cap Growth Fund [Member] T Rowe Price Mid Cap Growth Fund EBP, Reconciliation to Form 5500, Employer Contribution Receivable, Current Period EBP, Reconciliation to Form 5500, Employer Contribution Receivable, Current Period EBP, Reconciliation to Form 5500, Employer Contribution Receivable, Current Period EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Risk and Uncertainty EBP, Risk and Uncertainty [Text Block]