| Component: (Network and Table) | |
|---|---|
| Network | 100700 - Disclosure - Pension and Employee Benefit Plans - Details of Defined Benefit Pension Plan Asset Allocation by Asset Category (Detail) (http://www.cecoenviro.com/20161231/taxonomy/role/DisclosurePensionAndEmployeeBenefitPlansDetailsOfDefinedBenefitPensionPlanAssetAllocationByAssetCategoryDetail) |
| Table | Schedule Of Defined Benefit Plans Disclosures [Table] |
| Reporting Entity [Axis] | 0000003197 (http://www.sec.gov/CIK) |
| Defined Benefit Plan Disclosure [Line Items] | Period [Axis] | |||||||
|---|---|---|---|---|---|---|---|---|
2016-01-01 - 2016-12-31 | 2015-12-31 | |||||||
| Defined Benefit Plan, Asset Categories | Defined Benefit Plan, Asset Categories | |||||||
| Cash and cash equivalents [Member] | Equity Securities [Member] | Debt Securities [Member] | Plan Asset Categories | Cash and cash equivalents [Member] | Equity Securities [Member] | Debt Securities [Member] | Plan Asset Categories | |
Target Allocation | ||||||||
Percentage of Plan Assets | 100.00% | 100.00% | ||||||