v3.26.3
Employee Benefit Plan, Statement of Net Asset Available for Benefit (Statement) - USD ($)
$ in Thousands
Mar. 31, 2026
Mar. 31, 2025
EBP, Statement of Net Asset Available for Benefit [Line Items]    
Investments, at fair value: $ 1,189,562 $ 1,062,214
Total Investments 1,222,664 1,100,577
Employee contributions receivable 5 5
Employer contribution receivable 379 264
Net Assets Available for Benefits 1,223,048  
Net Assets Available for Benefits 1,223,048 1,100,846
Advanced Drainage Systems, Inc. Stock Fund    
EBP, Statement of Net Asset Available for Benefit [Line Items]    
Investments, at fair value: 595,111 562,419
Mutual Funds    
EBP, Statement of Net Asset Available for Benefit [Line Items]    
Investments, at fair value: 594,451 499,795
Stable Value Fund    
EBP, Statement of Net Asset Available for Benefit [Line Items]    
Investments, at fair value: $ 33,102 $ 38,363