| Component: (Network and Table) | |
|---|---|
| Network | 1070 - Disclosure - Details of Certain Consolidated Balance Sheet Captions - Schedule of Accounts Receivable (Detail) (http://cswindustrials.com/taxonomy/role/DisclosureDetailsOfCertainConsolidatedBalanceSheetCaptionsScheduleOfAccountsReceivable) |
| Table | Schedule of Accounts, Notes, Loans and Financing Receivable [Table] |
| Reporting Entity [Axis] | 0001624794 (http://www.sec.gov/CIK) |
| Accounts, Notes, Loans and Financing Receivable [Line Items] | Period [Axis] | |||||
|---|---|---|---|---|---|---|
2016-03-31 | 2015-03-31 | |||||
| Receivable Type [Axis] | Receivable Type [Axis] | |||||
| Accounts Receivable Trade [Member] | Other Receivables [Member] | Receivable [Domain] | Accounts Receivable Trade [Member] | Other Receivables [Member] | Receivable [Domain] | |
Accounts receivable, gross | ||||||
Less: Allowance for doubtful accounts | ( | ( | ||||
Accounts receivable, net | 52,637,000 | 48,941,000 | ||||