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v3.23.2

Other long-term liabilities - Schedule of Long-Term Liabilities and Deferred Credits (Detail) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Transactions with Third Party [Line Items] |  |
Contract adjustment payments | $ 78,056 | $ 113,876
Asset retirement obligations | 113,678 | 116,584
Advances in aid of construction | 90,096 | 88,546
Environmental remediation obligation | 41,092 | 42,457
Customer deposits | 35,360 | 34,675
Unamortized investment tax credits | 17,419 | 17,649
Deferred credits and contingent consideration | 45,937 | 39,498
Preferred shares, Series C | 12,067 | 12,072
Hook-up fees | 25,813 | 32,463
Lease liabilities | 21,415 | 21,834
Contingent development support obligations | 9,129 | 8,824
Other | 34,004 | 41,156
Other long-term liabilities | 549,874 | 595,442
Less: current portion | (119,495) | (134,212)
Other long-term liabilities, excluding current | 430,379 | 461,230
Related Party |  |
Transactions with Third Party [Line Items] |  |
Note payable to related party | $ 25,808 | $ 25,808

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