v3.26.1
Segment Reporting (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                        
Revenue from Contract with Customer, Excluding Assessed Tax $ 676,761 $ 693,354 $ 850,381 $ 829,880 $ 615,761 $ 690,538 $ 782,610 $ 815,336 $ 653,840 $ 662,367 $ 780,220 $ 778,046
Cost Of Goods Sold, Excluding Employee Stock Option Plan Special Dividend Compensation 439,097 434,202 510,249 499,442 389,509 448,944 488,669 482,882 401,877 402,518 477,543 446,586
Selling, General and Administrative Expense, Excluding Employee Stock Option Plan Special Dividend Compensation, Before Corporate and other costs 122,399 95,466 107,840 92,126 79,115 90,935 85,089 82,924 85,420 76,100 79,407 75,054
Segment Reporting, Other Segment Item, Amount (87,948) (58,807) (66,624) (51,690) (41,859) (50,669) (45,741) (37,096) (40,404) (35,646) (35,298) (36,364)
Operating Expenses 15,223 13,276 11,384 11,835 12,301 9,843 9,043 11,128 15,769 15,189 12,318 11,457
Consolidated Adjusted EBITDA 187,990 209,217 287,532 278,167 176,695 191,485 245,550 275,498 191,178 204,206 246,250 281,313
Interest Income (Expense), Nonoperating 25,145 22,579 23,116 23,029 22,729 23,094 23,156 22,824 22,878 22,331 21,941 21,712
Interest Income, Other (3,805) (8,450) (7,340) (5,405) (5,007) (4,545) (7,368) (6,565) (6,906) (6,515) (5,137) (3,489)
Depreciation, Depletion and Amortization, Nonproduction 59,818 51,522 54,693 50,228 49,610 47,766 44,807 41,098 42,889 38,053 36,721 37,240
Employee Benefit and Share-Based Payment Arrangement, Noncash 6,538 8,835 8,577 8,404 4,823 7,798 6,983 6,977 8,350 7,402 9,331 6,903
Transaction costs 23,509 7,172 9,317 807 672 5,924 2,685 10 390 1,030 52 1,972
Other Adjusted EBITDA adjustments 9,327 4,729 6,904 4,658 1,222 3,363 3,494 355 1,117 3,686 (383) 2,991
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest 39,432 122,743 208,191 189,422 99,220 108,562 171,176 210,507 120,156 135,707 183,602 227,288
Income Tax Expense (Benefit) 5,358 30,557 52,399 46,674 23,166 27,091 40,920 49,886 26,333 30,131 47,476 55,058
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest 35,235 94,037 156,500 144,091 76,788 82,289 131,174 162,322 95,479 106,880 137,027 173,905
Income (Loss) from Equity Method Investments (1,161) (1,851) (708) (1,343) (734) (818) (918) (1,701) (1,656) (1,304) (901) (1,675)
Gain (Loss) on Disposition of Assets for Financial Service Operations 28,026 87 (15,926) 7,024 3,426 (477) 617 292 2,304 2,512 123 (13,304)
Intersegment Eliminations                        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                        
Revenue from Contract with Customer, Excluding Assessed Tax (22,404) (23,959) (25,998) (25,685) (19,735) (18,976) (22,808) (26,159) (18,564) (27,912) (18,952) (18,818)
Cost Of Goods Sold, Excluding Employee Stock Option Plan Special Dividend Compensation (24,065) (23,040) (26,110) (24,928) (19,513) (20,723) (22,174) (24,879) (19,055) (25,766) (18,198) (18,023)
Segment Adjusted EBITDA 1,661 (919) 112 (757) (222) 1,747 (634) (1,280) 491 (2,146) (754) (795)
Stormwater Segment                        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                        
Revenue from Contract with Customer, Excluding Assessed Tax 534,749 540,473 670,665 651,527 478,799 540,525 639,012 668,034 531,439 543,895 648,757 637,429
Stormwater Segment | Intersegment Eliminations                        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                        
Revenue from Contract with Customer, Excluding Assessed Tax 8,870 9,174 9,346 9,076 8,530 8,913 8,885 9,319 7,550 7,883 7,479 7,737
Stormwater Segment | Operating Segments                        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                        
Revenue from Contract with Customer, Excluding Assessed Tax 543,619 549,647 680,011 660,603 487,329 549,438 647,897 677,353 538,989 551,778 656,236 645,166
Cost Of Goods Sold, Excluding Employee Stock Option Plan Special Dividend Compensation 377,356 372,861 435,834 427,119 329,009 384,562 439,031 430,226 352,852 358,306 427,291 387,377
Selling, General and Administrative Expense, Excluding Employee Stock Option Plan Special Dividend Compensation, Before Corporate and other costs 106,709 79,359 88,979 73,782 62,585 73,739 74,133 72,420 74,095 66,324 69,785 65,138
Segment Reporting, Other Segment Item, Amount (80,625) (51,356) (55,420) (43,793) (34,371) (40,110) (38,938) (30,189) (33,832) (29,566) (29,375) (30,193)
Segment Adjusted EBITDA 140,179 148,783 210,618 203,495 130,106 131,247 173,671 204,896 145,874 156,714 188,535 222,844
Wastewater Segment                        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                        
Revenue from Contract with Customer, Excluding Assessed Tax 142,012 152,881 179,716 178,353 136,962 150,013 143,598 147,302 122,401 118,472 131,463 140,617
Wastewater Segment | Intersegment Eliminations                        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                        
Revenue from Contract with Customer, Excluding Assessed Tax 13,534 14,785 16,652 16,609 11,205 10,063 13,923 16,840 11,014 20,029 11,473 11,081
Wastewater Segment | Operating Segments                        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                        
Revenue from Contract with Customer, Excluding Assessed Tax 155,546 167,666 196,368 194,962 148,167 160,076 157,521 164,142 133,415 138,501 142,936 151,698
Cost Of Goods Sold, Excluding Employee Stock Option Plan Special Dividend Compensation 85,806 84,381 100,525 97,251 80,013 85,105 71,812 77,535 68,080 69,978 68,450 77,232
Selling, General and Administrative Expense, Excluding Employee Stock Option Plan Special Dividend Compensation, Before Corporate and other costs 15,690 16,107 18,861 18,344 16,530 17,196 10,956 10,504 11,325 9,776 9,622 9,916
Segment Reporting, Other Segment Item, Amount (7,323) (7,451) (11,204) (7,897) (7,488) (10,559) (6,803) (6,907) (6,572) (6,080) (5,923) (6,171)
Segment Adjusted EBITDA $ 61,373 $ 74,629 $ 88,186 $ 87,264 $ 59,112 $ 68,334 $ 81,556 $ 83,010 $ 60,582 $ 64,827 $ 70,787 $ 70,721