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Amortization Of Acquisition-Related Intangible Assets And Inventory Step-Up Amortization Of Acquisition-Related Intangible Assets And Inventory Step-Up Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] GOODWILL AND INTANGIBLE ASSETS Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Less: Comprehensive income attributable to redeemable noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Fair Value Estimate of Fair Value Measurement [Member] REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Depreciation & amortization Cost, Depreciation and Amortization Minimum fixed charge coverage ratio Debt Instrument Covenant Fixed Charge Coverage Ratio Debt Instrument Covenant Fixed Charge Coverage Ratio Inventories Increase (Decrease) in Inventories Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Cost, amortization Cost, Amortization Schedule of Restricted Share Activity Nonvested Restricted Stock Shares Activity [Table Text Block] Segment Reporting [Table] Segment Reporting [Table] Shares available for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Greco US Business Greco US Business [Member] Greco US Business Net income attributable to redeemable noncontrolling interest Temporary Equity, Net Income Schedule of Future Minimum Debt Payments Schedule of Maturities of Long-Term Debt [Table Text Block] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] Schedule of Components of Lease Expense, Lease Assets and Liabilities, Supplemental Cash Flow, and Other Information Lease, Cost [Table Text Block] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Balance at beginning of the fiscal year: Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Operating income Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date Accrued and other current liabilities Disposal Group, Including Discontinued Operation, Accrued Liabilities MARS MARS [Member] MARS Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Amortization of deferred financing fees Amortization of Deferred Charges ACQUISITIONS Business Combination [Text Block] Vesting of performance shares and restricted stock units (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Cost expect to incur Restructuring and Related Cost, Expected Cost Share repurchases (in shares) Stock Repurchased During Period, Shares Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividend declared (in USD per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Impairment of assets Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Common shares, issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Finished goods Inventory, Finished Goods, Gross Treasury shares, at cost (in shares) Balance at beginning of the year (in shares) Ending balance (in shares) Treasury Stock, Common, Shares Reserve Accounts Receivable, Credit Loss Expense Accounts Receivable, Credit Loss Expense Fair value of other current asset Business Combination, Recognized Asset Acquired, Asset, Current Trademarks And Customer Lists Trademarks And Customer Lists [Member] Trademarks And Customer Lists Joyce Sales Group, LLC and Cooper2Glass, LLC Joyce Sales Group, LLC and Cooper2Glass, LLC [Member] Joyce Sales Group, LLC and Cooper2Glass, LLC OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Products and Services [Domain] Product and Service [Domain] Class of Stock [Line Items] Class of Stock [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Less: Income attributable to redeemable noncontrolling interest Less: Net income attributable to redeemable noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income attributable to CSW Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement period adjustments, other long-term assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets 2030 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Shares withheld for tax withholding obligation (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Assets acquired, amortization period Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table] Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table] Measurement period adjustments, inventory Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory Cash payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Finite lived intangible assets acquired Customer Lists (useful life of 15 years) Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived BUSINESS HELD FOR SALE AND EXIT ACTIVITIES Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Pension and other postretirement effects, net of taxes of $(1) and $(1), respectively Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other assets Other Assets, Noncurrent Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Document Type Document Type Current derivative asset Derivative Asset, Current Accrued and other current liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Impairment expenses Intangible Asset, Excluding Goodwill, Impairment Loss Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Work in process Inventory, Work in Process, Gross Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name ORGANIZATION AND OPERATIONS AND SUMMARY OF ACCOUNTING POLICIES Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Income before income taxes Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies (See Note 14) Commitments and Contingencies Gross Amount Intangible Asset, Finite-Lived, before Accumulated Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2031 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Equity, Attributable to Noncontrolling Interest [Roll Forward] Equity, Attributable to Noncontrolling Interest [Roll Forward] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Goodwill [Roll Forward] Goodwill [Roll Forward] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Trade Names Trade Names [Member] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Inventories, net Inventories, net Inventories, net Inventory, Net Equity Award [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Year Ending March 31, 2027 (excluding the three months ended June 30, 2026) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Unobservable Inputs (Level III ) Fair Value, Inputs, Level 3 [Member] Variable Interest Entity [Table] Variable Interest Entity [Table] Lease Liabilities - Long-Term Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation, Noncurrent Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation, Noncurrent Shares repurchased (in shares) Treasury Stock, Shares, Acquired 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One PEO Name PEO Name Accrued and other current liabilities Accrued Liabilities and Other Liabilities Balance at beginning of period Balance at end of period Contract with Customer, Liability Measurement period adjustments, accounts receivable, net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable Interest rate swaps: Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Payments of contingent consideration Payment for Contingent Consideration Liability, Financing Activities Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Related income tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Temporary increase for maximum leverage ratio Debt Instrument, Covenant, Maximum Leverage Ratio, Temporary Increase Debt Instrument, Covenant, Maximum Leverage Ratio, Temporary Increase Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Reissuance of treasury shares Stock Issued During Period, Value, Treasury Stock Reissued Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Customer Lists Customer Lists [Member] Trade name Trade Name (indefinite life) Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Indefinite-Lived Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Weighted Avg Life (Years) Finite Lived Intangible Asset, Weighted Average Useful Life Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Fair value of other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets Comprehensive income Other comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Other Long-Term Liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Cash paid for acquisitions, net of cash received Cash paid for acquisitions, net of cash received Payments to Acquire Businesses, Gross 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Total operating lease expense   Lease, Cost Disposal Group Name [Axis] Disposal Group Name [Axis] Schedule of Long-Term Debt Schedule of Debt [Table Text Block] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] LEASES Lessee, Operating Leases [Text Block] 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Schedule of Fair Value of Derivatives Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic (in USD per share) Earnings Per Share, Basic Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Purchase of treasury shares Payments for Repurchase of Common Stock Total current assets Assets, Current Range [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Remaining tax life Business Combination, Amortization Period, Remaining Tax Life Business Combination, Amortization Period, Remaining Tax Life Measurement period adjustments, trade name (indefinite life) Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Indefinite-Lived Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Indefinite-Lived Long-term debt Long-Term Debt, Excluding Current Maturities Short-term lease expense Short-Term Lease, Cost Award Type [Axis] Award Type [Axis] Payments of deferred loan costs Payments of Financing Costs Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net of allowance for expected credit losses of $2,426 and $2,314, respectively Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) 2015 Plan Equity And Incentive Compensation, 2015 Plan [Member] Products and Services [Axis] Product and Service [Axis] Fair value of restricted shares granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Fair Value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Fair Value Measurement period adjustments, cash Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash and Cash Equivalent Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash and Cash Equivalent Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Contingent consideration Acquisition-related contingent consideration liabilities Business Combination, Contingent Consideration, Liability Measurement period adjustments, long-term indemnity asset Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Indemnity Asset, Noncurrent Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Indemnity Asset, Noncurrent Operating lease expense Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] 2024 Plan Equity And Incentive Compensation, 2024 Plan [Member] Equity And Incentive Compensation, 2024 Plan Derivative Contract [Domain] Derivative Contract [Domain] Stock activity under stock plans APIC, Share-Based Payment Arrangement, Recognition and Exercise Currency translation Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] Other Information for Operating Leases Operating Leases, Other Information [Abstract] Operating Leases, Other Information Total liabilities, redeemable noncontrolling interest and equity Liabilities and Equity Intangible assets, net Intangible Asset, Including Goodwill, after Accumulated Amortization Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name [Axis] Plan Name [Axis] Operating lease liabilities Disposal Group, Including Discontinued Operation, Operating Lease Liabilities Disposal Group, Including Discontinued Operation, Operating Lease Liabilities Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid-in capital Additional Paid in Capital Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] Schedule of Share-Based Compensation Expense Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Other income (loss), net Other Nonoperating Income (Expense) Right-Of-Use Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Right-Of-Use Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Right-Of-Use Assets LONG-TERM DEBT Long-Term Debt [Text Block] 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Specialized Reliability Solutions Specialized Building Solutions [Member] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Canceled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Gain (Loss) from disposal of discontinued operation, before income tax Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Schedule of Changes in Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Table Text Block] Preferred shares, authorized (in shares) Preferred Stock, Shares Authorized Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Raw materials and supplies Inventory, Raw Materials and Supplies, Gross Accounts receivable, net Receivables, Net, Current Preferred shares, $0.01 par value Shares authorized (10,000) and issued (0) Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Reclassification of gains included in interest expense, net of taxes Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Measurement period adjustments, income tax receivable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Income Tax Receivable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Income Tax Receivable Share Repurchase Program [Axis] Share Repurchase Program [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Engineered Building Solutions Engineered Reliability Solutions [Member] Engineered Reliability Solutions Share Repurchase Program 2022 Share Repurchase Program 2022 [Member] Share Repurchase Program 2022 New contracts and revenue added to existing contracts during the period Contract with Customer, Liability, Increase for New Contracts And Revenue Added To Existing Contracts Contract with Customer, Liability, Increase for New Contracts And Revenue Added To Existing Contracts Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Capital expenditures Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Business combination target period Business Combination, Contingent Consideration, Liability, Period Business Combination, Contingent Consideration, Liability, Period Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Measurement period adjustments, accrued and other current liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Liabilities, Other Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Liabilities, Other Accounts payable Accounts Payable Discontinued Operations and Disposal Groups [Abstract] Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Dusk Acquisition Corporation Dusk Acquisition Corporation [Member] Dusk Acquisition Corporation Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Business combination, consideration transferred Business Combination, Consideration Transferred Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Impairment Goodwill, Impairment Loss Option exercise period Variable Interest Entity, Option Exercise Period Variable Interest Entity, Option Exercise Period Name Trading Arrangement, Individual Name Unrecognized compensation costs related to unvested restricted shares Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash Cash and Cash Equivalent Participating securities (in shares) Weighted Average Number of Shares, Restricted Stock Initiating member's equity interest (in percent) Variable Interest Entity Members Equity Interest Variable Interest Entity Members Equity Interest Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Company Selected Measure Amount Company Selected Measure Amount Total inventories Inventory, Gross Share Repurchase Program 2024 Share Repurchase Program 2024 [Member] Share Repurchase Program 2024 Stock, Class of Stock [Table] Stock, Class of Stock [Table] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Prime Rate Prime Rate [Member] Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Vested (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Provision for income taxes Expense for income taxes Income Tax Expense (Benefit) Cost of revenues Cost of revenues Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Maximum remaining length of interest rate swap contract Derivative, Remaining Maturity Consolidation Consolidation, Policy [Policy Text Block] Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Variable Interest Entity Variable Interest Entity, Primary Beneficiary [Member] Right-of-use lease assets Disposal Group, Including Discontinued Operation, Right-of-use Lease Assets Disposal Group, Including Discontinued Operation, Right-of-use Lease Assets Deferred Tax Liabilities Business Combination, Recognized Liability Assumed, Deferred Tax Liability AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Net income attributable to CSW Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Swingline Loans Bridge Loan [Member] Statement [Table] Statement [Table] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Analysis of Changes in Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Vesting of performance shares and restricted stock units Performance Shares And Restricted Stock Units [Member] Performance Shares And Restricted Stock Units Schedule of Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Federal Funds Effective Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Stock Compensation Plan Share-Based Payment Arrangement [Member] Share Repurchase Program 2025 Share Repurchase Program 2025 [Member] Share Repurchase Program 2025 Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Contingency Reserve Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingency Reserve Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingency Reserve Derivative Instruments and Hedging Activities Disclosure [Abstract]