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Business Segments Information (Tables)

3 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

Schedule of Revenue from Reportable Segments by Product Type

The following table sets forth reportable segment information with respect to the amount of Net sales contributed by each class of similar products for the periods presented:

			Three Months Ended June 30, 2026
(Amounts in thousands)			Stormwater						Wastewater						Intersegment Eliminations						Total
Net sales:
Net sales from external customers			$	809,376					$	191,736					$	—					$	1,001,112
Intersegment net sales			11,566						17,184						(28,750)						—
Net sales			820,942						208,920						(28,750)						1,001,112
Significant segment expenses:
Costs of goods sold			518,812						104,600						(30,347)						593,065
Selling, general and administrative expenses			100,681						17,650						—						118,331
Other segment items(a)			(72,252)						(8,789)						—						(81,041)
Segment Adjusted EBITDA(b)			$	273,701					$	95,459					$	1,597
Corporate and other costs(c)																					12,487
Total consolidated Adjusted EBITDA																					$	358,270
Reconciliation of total reportable segment Adjusted EBITDA to income from continuing operations before income taxes:
Interest expense, net																					27,040
Interest income																					(1,291)
Depreciation and amortization																					62,157
Stock-based compensation expense																					13,274
Loss (gain) on disposal of assets and costs from exit and disposal activities																					2,621
Transaction costs(d)																					3,244
Inventory step up related to acquisition of NDS																					14,197
Other adjustments(e)																					8,068
Income before income taxes																					228,960
Income tax expense																					53,689
Equity in net income of unconsolidated affiliates																					(1,297)
Net income from continuing operations																					$	176,568

(a)Other segment items include depreciation, amortization recorded within cost of goods sold, stock-based compensation expense, inventory step-up costs, restructuring and realignment expense, and transaction costs.

(b)The Company calculates Segment Adjusted EBITDA as net income from continuing operations before interest, income taxes, depreciation and amortization, stock-based compensation expense, non-cash charges and certain other gains and expenses.

(c)Represents certain unallocated selling, general and administrative expenses required to reconcile segment Adjusted EBITDA to consolidated Adjusted EBITDA.

(d)Represents expenses recorded related to legal, accounting and other professional fees incurred in connection with business or asset acquisitions and dispositions.

(e)Includes derivative fair value adjustments, foreign currency transaction (gains) losses, legal settlements, restructuring and realignment expense, and executive retirement expense (benefit).

			Three Months Ended June 30, 2025
(Amounts in thousands)			Stormwater						Wastewater						Intersegment Eliminations						Total
Net sales:
Net sales from external customers			$	651,527					$	178,353					$	—					$	829,880
Intersegment net sales			9,076						16,609						(25,685)						—
Net sales			660,603						194,962						(25,685)						829,880
Significant segment expenses:
Costs of goods sold			427,119						97,251						(24,928)						499,442
Selling, general and administrative expenses			73,782						18,344						—						92,126
Other segment items(a)			(43,793)						(7,897)						—						(51,690)
Segment Adjusted EBITDA(b)			$	203,495					$	87,264					$	(757)
Corporate and other costs(c)																					11,835
Total consolidated Adjusted EBITDA																					$	278,167
Reconciliation of total reportable segment Adjusted EBITDA to income from continuing operations before income taxes:
Interest expense, net																					23,029
Interest income																					(5,405)
Depreciation and amortization																					50,228
Stock-based compensation expense																					8,404
Loss (gain) on disposal of assets and costs from exit and disposal activities																					7,024
Transaction costs(d)																					807
Other adjustments(e)																					4,658
Income before income taxes																					189,422
Income tax expense																					46,674
Equity in net income of unconsolidated affiliates																					(1,343)
Net income from continuing operations																					$	144,091

(a)Other segment items include depreciation, amortization recorded within cost of goods sold, stock-based compensation expense, inventory step-up costs, restructuring and realignment expense, and transaction costs.

(b)The Company calculates Segment Adjusted EBITDA as net income from continuing operations before interest, income taxes, depreciation and amortization, stock-based compensation expense, non-cash charges and certain other gains and expenses.

(c)Represents certain unallocated selling, general and administrative expenses required to reconcile segment Adjusted EBITDA to consolidated Adjusted EBITDA.

(d)Represents expenses recorded related to legal, accounting and other professional fees incurred in connection with business or asset acquisitions and dispositions.

(e)Includes derivative fair value adjustments, foreign currency transaction (gains) losses, legal settlements, inventory step-up costs, restructuring and realignment expense, and executive retirement expense (benefit).

The following sets forth certain financial information attributable to the reportable segments for the periods presented:

			Three Months Ended June 30,
(In thousands)			2026						2025
Depreciation and Amortization
Stormwater			$	40,504					$	28,896
Wastewater			18,867						19,254
Other			2,786						2,078
Total			$	62,157					$	50,228
Capital Expenditures
Stormwater			$	42,504					$	40,602
Wastewater			14,356						5,735
Other			291						6,261
Total			$	57,151					$	52,598

X

- Definition

Tabular disclosure of reconciliation of revenue by reportable segment to consolidated revenue.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

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X

- References

No definition available.

+ Details

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